SNR016
16M-bit Mask ROM
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7.1
7.2
8.
Contents
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INTRODUCTION............................................................................................................... 3
FEATURES ....................................................................................................................... 3
PIN ASSIGNMENTS ......................................................................................................... 3
Memory mapping for AD Bus Interface......................................................................... 4
ABSOLUTE MAXIMUM RATINGS................................................................................... 5
ELECTRICAL CHARACTERISTICS ................................................................................ 5
Application circuit ........................................................................................................... 6
AD Bus Interface (with SNC710) .................................................................................. 6
Standard ROM interface (with SNL310) ....................................................................... 7
BONDING PAD ................................................................................................................. 8
Ver. 1.4
1
October 21, 2005
SNR016
16M-bit Mask ROM
AMENDENT HISTORY
Version
Ver 1.0
Ver 1.1
Ver 1.2
Ver 1.3
Ver 1.4
Date
April 21, 2003
July 30, 2003
January 14, 2004
V1.0 first issue
V1.1 Modify operation current from typ.4mA -> MAX.4mA
V1.2 Modify “TYPE” setting.
V1.3 Modify Application circuit of AD Bus Interface.
V1.4 Modify Supply Voltage from Max 6V to Max 3.6V
Description
March 17, 2004
October 21, 2005
Ver. 1.4
2
October 21, 2005
SNR016
16M-bit Mask ROM
1. INTRODUCTION
The SNR016 is a signal power, 16M-bit, read only memory. It is organized as 2M bytes,
operates for single 3V power supply, support static standby mode. The SNR016
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.
SNR016 offers automatic power-down, with power-down controlled by the chip enable
“CEB”. When chip enable goes to high, SNR016 will entry power-down mode in order
to save the power consumption.
2. FEATURES
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♦
♦
♦
♦
Power supply: 2.4V ~ 3.6V
Memory Size: 16M-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
TYPE
A[8..20]
A[7]
A[6]
A[5]
A[4]
A[3]
A[2]
A[1]
A[0]
D[0..7]
CEB
OEB
VDD
GND
I/O
Standard ROM interface
I 0: Standard ROM type
I Standard ROM Address [8..20]
I Standard ROM Address A7
I Standard ROM Address A6
I Standard ROM Address A5
I Standard ROM Address A4
I Standard ROM Address A3
I Standard ROM Address A2
I Standard ROM Address A1
I Standard ROM Address A0
I/O Standard ROM Data [0..7]
I Standard ROM Chip Enable
I Standard ROM Output Enable
P 3.3volt Positive Power supply
P Ground
AD Bus interface
1: AD Bus interface
NC
TESTM
Bank Select 4
Bank Select 3
Bank Select 2
Bank Select 1
NC
ALECLK
READY
Address/Data bus [0..7]
Chip Enable
NC
3.3volt Positive Power supply
Ground
Ver. 1.4
3
October 21, 2005
SNR016
16M-bit Mask ROM
4. MEMORY MAPPING
For 8-bit AD (address/data) bus interface, all the address and data communication
between SNC710 and SNR016 are through data bus D[0..7]. SNC710 allows user to
connect maximum 2 external mask ROM, and SNR016 has 4 bank select pins
(BS1~BS4) to specify the memory region of each mask ROM.
BS4~BS1
0010
0011
0100
0101
0110
0111
1000
1001
1010
1011
1100
1101
1110
1111
Address Region
0x0200000 ~ 0x02FFFFF
0x0300000 ~ 0x03FFFFF
0x0400000 ~ 0x04FFFFF
0x0500000 ~ 0x05FFFFF
0x0600000 ~ 0x06FFFFF
0x0700000 ~ 0x07FFFFF
0x0800000 ~ 0x08FFFFF
0x0900000 ~ 0x09FFFFF
0x0A00000 ~ 0x0AFFFFF
0x0B00000 ~ 0x0BFFFFF
0x0C00000 ~ 0x0CFFFFF
0x0D00000 ~ 0x0DFFFFF
0x0E00000 ~ 0x0EFFFFF
0x0F00000 ~ 0x0FFFFFF
Table-1
Note: For the address region 0x00000~0x01FFFFF are reserved, and the setting
of bank select pins BS4~BS1 CAN’T be the range 0000~0x0001.
Ver. 1.4
4
October 21, 2005
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