KS57C2308/P2308/C2316/P2316 KS57P2308/P2316 OTP
16-3
Table 16-1. Pin Descriptions Used to Read/Write the EPROM
Main Chip During Programming
Pin Name Pin Name Pin No. I/O Function
VLC1 SDAT 10 I/O Serial data pin. Output port when reading and
input port when writing can be assigned as
Input/push-pull output port respectively.
VLC2 SCLK 11 I/O Serial clock pin. Input only pin.
TEST VPP (TEST) 16 IPower supply pin for EPROM cell writing
(indicates that OTP enters into the writing mode).
When 12.5 V is applied, OTP is in writing mode
and when 5 V is applied, OTP is in reading mode.
(Option)
RESET RESET 19 IChip initialization
VDD / VSS VDD / VSS 12/13 ILogic power supply pin. VDD should be tied to +5
V during programming.
Table 16-2. Comparison of KS57P2308/P2316 and KS57C2308/C2316 Features
Characteristic KS57P2308/P2316 KS57C2308/C2316
Program Memory 8 K/16 K-byte EPROM 8 K/16-Kbyte mask ROM
Operating Voltage (VDD)1.8 V to 5.5 V 1.8 V to 5.5 V
OTP Programming Mode VDD = 5 V, VPP (TEST) = 12.5 V –
Pin Configuration 80 QFP 80 QFP
EPROM Programmability User Program 1 time Programmed at the factory
OPERATING MODE CHARACTERISTICS
When 12.5 V is supplied to the Vpp (TEST) pin of the KS57P2308/P2316, the EPROM programming mode is
entered. The operating mode (read, write, or read protection) is selected according to the input signals to the pins
listed in Table 16-3 below.
Table 16-3. Operating Mode Selection Criteria
VDD Vpp
(TEST) REG/
MEM Address
(A15-A0) R/WMode
5 V 5 V 00000H 1EPROM read
12.5V 00000H 0EPROM program
12.5V 00000H 1EPROM verify
12.5V 10E3FH 0EPROM read protection
NOTE: "0" means low level; "1" means high level.