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參數(shù)資料
| 型號： | μPD78P4038 |
| 廠商： | NEC Corp. |
| 英文描述： | 8/16 Bit Single Chip Microcontrollers(8/16位單片微控制器) |
| 中文描述： | 8 / 16位單片機微控制器（8 / 16位單片微控制器） |
| 文件頁數(shù)： | 16/72頁 |
| 文件大小： | 325K |
| 代理商： | ΜPD78P4038 |
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μ
PD78P4038
16
4.2.2 Pin functions
(1) V
PP
(Programming power supply): Input
Input pin for setting the
μ
PD78P4038 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
PD78P4038 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
PD78P4038 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
PD78P4038 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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