SNR008

8M-bit Mask ROM

======== Contents ========

INTRODUCTION............................................................................................................... 3

FEATURES ....................................................................................................................... 3

PIN ASSIGNMENTS ......................................................................................................... 3

Memory mapping for AD Bus Interface......................................................................... 4

ABSOLUTE MAXIMUM RATINGS................................................................................... 5

ELECTRICAL CHARACTERISTICS ................................................................................ 5

Application circuit ........................................................................................................... 6

7.1

AD Bus Interface (with SNC710) .................................................................................. 6

7.2

Standard ROM interface (with SNL310) ....................................................................... 7

BONDING PAD................................................................................................................. 8

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

AMENDENT HISTORY

Version Date

Description

Ver 1.0 March 11, 2003

V1.0 first issue

Ver 1.1 April 18, 2003

Modify the pin assignment table

Add bonding pad information & application circuit

Ver 1.2 April 21, 2003

Modify application circuit & bonding pad information

Ver 1.3 August 29, 2003

Modify operation current from typ.4mA -> MAX. 4mA

Modify access time Max = 200ns in

Electrical Characteristic

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

1. INTRODUCTION

The SNR008 is a signal power, 8M-bit, read only memory. It is organized as 1M bytes,
operates for single 3V power supply, support static standby mode. The SNR008
embedded two different interfaces, one is a standard 8-bit interface bus which
compatible with SNL310, another one is a special 8-bit AD (address/data) bus which
compatible with SNC710.
SNR008 offers automatic power-down, with power-down controlled by the chip enable
"CE\". When chip enable goes to high, SNR008 will entry power-down mode in order to
save the power consumption.

2. FEATURES

Power supply: 2.4V ~ 3.6V

Memory Size: 8M-bit
Totally static operation
Embedded a standard 8-bit bus interface compatible with SNL310 or a 8-bit AD
(address/data) bus interface compatible with SNC710
Access time: 200ns @3V

3. PIN ASSIGNMENTS

Symbol I/O

Standard ROM interface

AD Bus interface

TYPE

I 1: Standard ROM type

0: AD Bus interface

A[8..19]

I Standard ROM Address [8..19] NC

A[7]

I Standard ROM Address A7

TESTM

A[6]

I Standard ROM Address A6

Bank Select 4

A[5]

I Standard ROM Address A5

Bank Select 3

A[4]

I Standard ROM Address A4

Bank Select 2

A[3]

I Standard ROM Address A3

Bank Select 1

A[2]

I Standard ROM Address A2

Bank Select 0

A[1]

I Standard ROM Address A1

ALECLK

A[0]

I Standard ROM Address A0

READY

D[0..7]

I/O Standard ROM Data [0..7]

Address/Data bus [0..7]

CEB

I Standard ROM Chip Enable

Chip Enable

OEB

I Standard ROM Output Enable NC

VDD

P 3.3volt Positive Power supply

3.3volt Positive Power supply

GND

P Ground

Ground

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

4. Memory mapping for AD Bus Interface

For 8-bit AD (address/data) bus interface, all the address and data communication
between SNC710 and SNR008 are through data bus D[0..7]. SNC710 allows user to
connect maximum 2 external mask ROM, and SNR008 has 5 bank select pins
(BS0~BS4) to specify the memory region of each mask ROM.

BS4~BS0

Address Region

BS4~BS0

Address Region

00100

0x0200000 ~ 0x027FFFF

10010

0x0900000 ~ 0x097FFFF

00101

0x0280000 ~ 0x02FFFFF

10011

0x0980000 ~ 0x09FFFFF

00110

0x0300000 ~ 0x037FFFF

10100

0x0A00000 ~ 0x0A7FFFF

00111

0x0380000 ~ 0x03FFFFF

10101

0x0A80000 ~ 0x0AFFFFF

01000

0x0400000 ~ 0x047FFFF

10110

0x0B00000 ~ 0x0B7FFFF

01001

0x0480000 ~ 0x04FFFFF

10111

0x0B80000 ~ 0x0BFFFFF

01010

0x0500000 ~ 0x057FFFF

11000

0x0C00000 ~ 0x0C7FFFF

01011

0x0580000 ~ 0x05FFFFF

11001

0x0C80000 ~ 0x0CFFFFF

01100

0x0600000 ~ 0x067FFFF

11010

0x0D00000 ~ 0x0D7FFFF

01101

0x0680000 ~ 0x06FFFFF

11011

0x0D80000 ~ 0x0DFFFFF

01110

0x0700000 ~ 0x077FFFF

11100

0x0E00000 ~ 0x0E7FFFF

01111

0x0780000 ~ 0x07FFFFF

11101

0x0E80000 ~ 0x0EFFFFF

10000

0x0800000 ~ 0x087FFFF

11110

0x0F00000 ~ 0x0F7FFFF

10001

0x0880000 ~ 0x08FFFFF

11111

0x0F80000 ~ 0x0FFFFFF

Table-1

Note: For the address region 0x00000~0x01FFFFF are reserved, and the setting
of bank select pins BS4~BS0 CAN'T be the range 0000~0x0011.

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

5. ABSOLUTE MAXIMUM RATINGS

Items

Symbol

Min

Max

Unit.

Supply Voltage

-V -0.3 6.0

Input Voltage

GND-0.3

+0.3 V

Operating Temperature

0 55

Storage Temperature

STG

-55.0 125.0

6. ELECTRICAL CHARACTERISTICS

Item

Sym. Min. Typ. Max. Unit

Condition

Operating Voltage

2.4 - 3.6 V

Standby current

SBY

- 1.5 2.0 uA

=3V, no load

Operating Current

OPR

- 4 - mA

=3V, no load

Address access time

tAA

200

ns Vdd=3V

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

7. Application circuit

7.1 AD Bus Interface (with SNC710)

330

SNR008

TYPE

VDD

AD0

AD1

AD2

AD3

GND

AD4

AD5

AD6

AD7

VDD

CEB

READY

ALECLK

GND

BS0

BS1

BS2

BS3

BS4

TESTM

SNR008

TYPE

VDD

AD0

AD1

AD2

AD3

GND

AD4

AD5

AD6

AD7

VDD

CEB

READY

ALECLK

GND

BS0

BS1

BS2

BS3

BS4

TESTM

CONN 18

1
2

3
4
5
6
7

8
9
10
11
12

13
14
15
16
17

ROM#2

0x280000-0x2FFFFF

ROM#1

0x200000-0x27FFFF

Extension ROM card

VDD3V

0.1uF

220K

TR3

TR4

SPEAKER

TR6

TR5

TR1

TR2

TR8

TR7

47uF

VDD3V

SNC710

VDD

CVDD

RST

BP0

BN0

XIN

XOUT

LXIN

LXOUT

TEST

CKSEL

P0.0

P0.1

P0.2

P0.3

P0.4

P0.5

P0.6

P0.7

P0.8

P0.9

P0.10

P0.11

P0.12

P0.13

P0.14

P0.15

P1.0

P1.1

P1.2

P1.3

P1.4

P1.5

P1.6

P1.7

GND

VDD

CVDD

AD0

AD1

AD2

AD3

AD4

AD5

AD6

GND

CEB

CEIN

READY

ALECLK

CLKIN

AD7

CVDD

EXTM

CONN 18

1
2

3
4
5
6
7

8
9

10
11
12

13
14
15
16
17

VDD3V

ROM Interface

VDD3V

330

AD2

VDD3V

AD1

GND

AD0

AD5

AD3

AD4

CE_

AD7

AD6

ALECLK

VDD3V

GND

READY

GND

VDD3V

GND

AD2

AD1

AD0

AD3

AD4

GND

AD7

AD6

AD5

READY

CE_

VDD3V

ALECLK

GND

VDD3V

GND

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

7.2 Standard ROM interface (with SNL310)

VDD

1.5V

VDD

47uF

0.1uF

VDD

SNR008

TYPE

OEB

VDD

A10

A11

A12

A13

A14

A15

A16

A17

A19

AD0/D0

AD1/D1

AD2/D2

AD3/D3

GND

AD4/D4

AD5/D5

AD6/D6

AD7/D7

VDD

CEB

READYB/A0

ALECLK/A1

GND

BS0/A2

BS1A3

BS2/A4

BS3/A5

BS4/A6

TESTM/A7

A18

SPEAKER

VDD

32768HZ

15pF

VDD

R1
220K

C1
0.1uF

VDD

1
6
M

1
5
p
F

U1
SNL310

VDD

CVDD

GND

RST

BP0

BN0

XIN

XOUT

LXIN

LXOUT

TESTM

CKSEL

P2.0

P2.1

P2.2

P2.3

P2.4

P2.5

P2.6

P2.7

P2.8

P2.9

P2.10

P2.11

P2.12

P2.13

P2.14

P2.15

GND

P3.0

P3.1

P3.2

P3.3

P3.4

P3.5

P3.6

P3.7

P3.8

P3.9

P3.10

P3.11

P3.12

P3.13

P3.14

P3.15

P5.0

P5.1

P5.2

P5.3

P5.4

P5.5

P5.6

P5.7

P5.8

P5.9

P5.10

P5.11

P5.12

P5.13

P5.14

P5.15

P4.0

P4.1

P4.2

P4.3

P4.4

P4.5

P4.6

P4.7

P4.15

P4.14

P4.13

P4.12

P4.11

P4.10

P4.9

P4.8

VDD

A4
A5

A7
A8

A10

A11
A12

A13

A14
A15

A16

A17
A18

A19

CEB

RDB

A2 A1

P2_0

P2_1

P2_2
P2_3

A10

P2_4

A11

P2_5

A12

A13

P2_6

A14

A15

P2_7

P2_9

P2_8

P2_10

P2_11

P2_12
P2_13

P2_15

P2_14

RST

A16

A17

A19

A18

A21

A20

RDB

D3
D4

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

8. BONDING PAD

9 10 11 12 13 14 15 16 17 18 19 20

0/D0

/
D

3/D

/
D

6/D

7/D

/
A0

/
A

TESTM/A7

TYPE

OEB

VDD

A10

A11

A12

A13

A14

A15

A16

A17

A18

A19

(0.00,0.00)

Note: The substrate MUST be connected to Vss in PCB layout.

Ver. 1.3

August 29, 2003

SNR008

8M-bit Mask ROM

Ver. 1.3

August 29, 2003

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Электронный компонент: SNR008