參數(shù)資料
型號： UPD78P4038YGC-8BT
廠商： NEC Corp.
英文描述： 16/8-BIT SINGLE-CHIP MICROCONTROLLER
中文描述： 16/8-BIT單片機
文件頁數(shù)： 16/72頁
文件大小： 435K
代理商： UPD78P4038YGC-8BT
μ
PD78P4038Y
16
4.2.2 Pin functions
(1) V
PP
(Programming power supply): Input
Input pin for setting the
μ
PD78P4038Y to the PROM programming mode. When the input voltage on this pin
is +5 V or more and when RESET input goes low, the
μ
PD78P4038Y enters the PROM programming mode.
When CE is made low for V
PP
= +12.5 V and OE = high, program data on D0 to D7 can be written into the internal
PROM cell selected by A0 to A16.
(2) RESET (Reset): Input
Input pin for setting the
μ
PD78P4038Y to the PROM programming mode. When input on this pin is low, and
when the input voltage on the V
PP
pin goes +5 V or more, the
μ
PD78P4038Y enters the PROM programming
mode.
(3) A0 to A16 (Address bus): Input
Address bus that selects an internal PROM address (0000H to 1FFFFH)
(4) D0 to D7 (Data bus): I/O
Data bus through which a program is written on or read from internal PROM
(5) CE (Chip enable): Input
This pin inputs the enable signal from internal PROM. When this signal is active, a program can be written or
read.
(6) OE (Output enable): Input
This pin inputs the read strobe signal to internal PROM. When this signal is made active for CE = low, a one-
byte program in the internal PROM cell selected by A0 to A16 can be read onto D0 to D7.
(7) PGM (Program): Input
The input pin for the operation mode control signal of the internal PROM.
Upon activation, writing to the internal PROM is enabled.
Upon inactivation, reading from the internal PROM is enabled.
(8) V
DD
Positive power supply pin
(9) V
SS
Ground potential pin
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