參數資料
型號: μPD78P058FY
廠商: NEC Corp.
元件分類: 8位微控制器
英文描述: 8 Bit Single Chip Microcontrollers
中文描述: 8位單片機微控制器
文件頁數: 23/74頁
文件大?。?/td> 520K
代理商: ΜPD78P058FY
μ
PD78P058FY
23
5.
PROM PROGRAMMING
The
μ
PD78P058FY has an on-chip 60-Kbyte PROM as a program memory. For programming, set the PROM
programming mode by the V
PP
and RESET pins. For connecting unused pins, refer to
PIN CONFIGURATIONS (Top
View) (2) PROM programming mode
.
Caution
Program writing should be performed in the address range 0000H to EFFFH (the last address,
EFFFH, should be specified). Writing cannot be performed with a PROM programmer that cannot
specify the write addresses.
5.1
Operating Modes
When +5 V or +12.5 V is applied to the V
PP
pin and a low level signal is applied to the RESET pin, the PROM
programming mode is set. This mode will become the operating mode as shown in Table 5-1 when the CE, OE and
PGM pins are set as shown.
Further, when the read mode is set, it is possible to read the contents of the PROM.
Table 5-1. Operating Modes of PROM Programming
Pin
RESET
V
PP
V
DD
CE
OE
PGM
D0 to D7
Operating Mode
Page data latch
L
+12.5 V
+6.5 V
H
L
H
Data input
Page write
H
H
L
High-impedance
Byte write
L
H
L
Data input
Program verify
L
L
H
Data output
Program inhibit
×
H
H
High-impedance
×
L
L
Read
+5 V
+5 V
L
L
H
Data output
Output disable
L
H
×
High-impedance
Standby
H
×
×
High-impedance
Remark
×
: L or H
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