FlashFlex51 MCU
SST89E52RD2 / SST89E54RD2 / SST89E58RD2 / SST89E516RD2
SST89V52RD2 / SST89V54RD2 / SST89V58RD2 / SST89V516RD2
Preliminary Specifications
TABLE
4-2: EXTERNAL HOST MODE COMMANDS FOR SST89E/V516RD2
PROG#/
P3[5:4]
Operation
RST PSEN#
ALE
EA# P3[7] P3[6] P2[7] P2[6] P0[7:0] P2[5:0] P1[7:0]
Read-ID
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIH1
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIL
VIH
1
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIL
VIL
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIH
VIL
VIL
VIH
VIL
VIL
VIH
VIL
VIH
VIH
VIL
VIL
VIL
VIH
VIL
VIH
VIL
VIL
VIL
VIL
VIH
VIH
VIL
VIL
VIL
VIL
VIH
VIH
VIL
VIL
VIL
VIH
VIH
VIH
VIL
VIL
VIH
VIH
VIH
VIH
VIH
VIH
VIL
DO
X
AH
X
AL
X
Chip-Erase
Block-Erase
Sector-Erase
Byte-Program
Byte-Verify (Read)
Select-Block0
Select-Block1
Prog-SC0
X
X
X
X
AH
AH
AH
55H
A5H
5AH
X
AL
AL
AL
X
DI
DO
X
VIH
X
X
X
X
Prog-SB1
X
X
Prog-SB2
X
X
X
Prog-SB3
X
X
X
Enable-Clock-Double
X
55H
X
T4-2.0 1255
1. Symbol signifies a negative pulse and the command is asserted during the low state of PROG#/ALE input. All other combinations
of the above input pins are invalid and may result in unexpected behaviors.
Note: VIL = Input Low Voltage; VIH = Input High Voltage; VIH1 = Input High Voltage (XTAL, RST); X = Don’t care; AL = Address low order byte;
AH = Address high order byte; DI = Data Input; DO = Data Output
V
V
RST
SS DD
Input/
Output
Data
0
Port 0
6
7
Bus
0
1
0
1
2
3
4
5
6
7
2
3
4
5
Address Bus
A -A
13 8
Port 2
Ready/Busy#
Port 3
A
A
14
Address Bus
6
7
0
Flash
Control Signals
A
-A
15 14
15
Flash
Control Signals
Address Bus
Port 1
6
7
A -A
7
0
EA# ALE /PSEN#
PROG#
1255 F07.0
FIGURE
4-1: I/O PIN ASSIGNMENTS FOR EXTERNAL HOST MODE
©2004 Silicon Storage Technology, Inc.
S71255-00-000
3/04
36
SST [ SILICON STORAGE TECHNOLOGY, INC ]
