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S3F80P5_UM_ REV1.00
Table 18-1. Descriptions of Pins Used to Read/Write the Flash ROM
Main Chip
Pin Name
Pin Name
P0.0
SDAT
P0.1
SCLK
TEST
TEST
nRESET
nRESET
V
,
V
DD
V
SS
NOTE: Test Pin Voltage
The TEST pin on socket board for OTP/MTP writer must be connected to Vdd (3.3V). The TEST pin on socket board
must not be connected Vpp(12.5V) which is generated from OTP/MTP Writer. So the specific socket board for
S3F80P5 must be used, when writing or erasing using OTP/MTP writer.
Pin No.
5
6
4
7
,
24,
DD
1
V
SS
During Programming
I/O
I/O
Serial data pin. Output port when reading and
input port when writing. Can be assigned as a
Input/push-pull output port.
I
Serial clock pin. Input only pin.
I
Tool mode selection when TEST pin sets Logic
value '1'. If user uses the flash writer tool mode
(ex.spw2+ etc.), user should connect TEST pin to
V
. (S3F80P5 supplies high voltage 12.5V by
DD
internal high voltage generation circuit.)
I
Chip Initialization
–
Power supply pin for logic circuit. VDD should be
tied to +3.3V during programming.
S3F80P5 FLASH MCU
Function
18-3
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