upd17p401 ETC-unknow, upd17p401 Datasheet - Page 19

• Manufacturer Part Number: upd17p401
• Description: One-time Prom Version 4-bit Single Chip Microcontroller With Dedicated On-chip Camera Hardware
• Manufacturer: ETC-unknow

3. ONE-TIME PROM (PROGRAM MEMORY) WRITE, READ AND VERIFY OPERATIONS
PROM. In normal operation, this PROM is accessed in a 16-bit word mode, but in program memory write,
read and verify operations the memory is accessed in 8-bit word mode. In this case, the high-order 8 bits of
the 16-bit word are allocated to an even address, and the low-order 8 bits to an odd address.
Writing to the on-chip PROM is performed using a PROM programmer and dedicated program adapter. The
following types of PROM programmer and program adapter should be used:
3.1
write/read/verify mode.
ground via a pull-down resistor (470
Remarks X: L or H
The program memory incorporated in the PD17P401 is 24576
For PROM write, read and verify operations, PROM mode is set and the pins shown in Table 3-1 are used.
Address updating is performed by means of clock input from the CLK pin rather than by address input.
PROM programmer
Program adapter
When +6 V is applied to the V
This mode is one of the operating modes shown in Table 3-2 according to the setting of pins MD0 to MD3.
Input pins not used in the program memory write/read/verify mode should be left open or connected to
+12.5 V
V
PROGRAM MEMORY WRITE/READ/VERIFY OPERATING MODES
PP
+6 V
V
DD
Table 3-2 Program Memory Write/Read/Verify Operating Modes
Table 3-1 Pins Used in Program Memory Write, Read and Verify
Operating Mode Specification
V
CLK
MD0 to MD3
D0 to D7
V
PP
DD1
Pin Name
MD0
, V
H
H
L
L
DD
AF-9703 (Manufactured by Ando Electric, Co., Ltd.)
AF-9704 (Manufactured by Ando Electric, Co., Ltd.)
AF-9808D (Manufactured by Ando Electric, Co., Ltd.)
DD2
pin and +12.5 V to the V
) (see “PIN CONFIGURATION (2) PROM PROGRAMMING MODE”).
MD1
H
X
L
L
Program voltage (12.5 V) application
Address update clock input
Operating mode selection
8-bit data input/output
Supply voltage (6 V) application
MD2
H
H
H
H
PP
MD3
Function
H
H
H
L
pin, the PD17P401 enters a program memory
8-bit electrically programmable one-time
Program memory address zero-clear
Write mode
Read/verify mode
Program inhibit mode
Operating Mode
PD17P401
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