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參數(shù)資料
| 型號： | 87C749EFPN |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | 80C51 8-bit microcontroller family |
| 中文描述： | 80C51的8位單片機系列 |
| 文件頁數(shù)： | 17/22頁 |
| 文件大?。?/td> | 164K |
| 代理商： | 87C749EFPN |
Philips Semiconductors
Preliminary specification
83C749/87C749
80C51 8-bit microcontroller family
2K/64 OTP/ROM, 5 channel 8-bit A/D, PWM, low pin count
1998 Apr 23
17
A0–A10
ADDRESS STROBE
PROGRAMMING
PULSES
V
PP
/V
IH
VOLTAGE
SOURCE
CLK SOURCE
CLOGIC
87C749
P3.0–P3.7
P0.0/ASEL
P0.1
P0.2
XTAL1
RESET
V
CC
V
SS
P1.0–P1.7
+5V
DATA BUS
SU00309
Figure 7. Programming Configuration
MIN 2 MACHINE
CYCLES
TEN BIT SERIAL CODE
BIT 0
BIT 1
BIT 2
BIT 3
BIT 4
BIT 5
BIT 6
BIT 7
BIT 8
BIT 9
UNDEFINED
UNDEFINED
XTAL1
RESET
P0.2
P0.1
SU00302
Figure 8. Entry into Program/Verify Modes
5V
12.75V
5V
25 PULSES
t
SHGL
t
GHSL
t
GLGH
t
GHGL
98
μ
s MIN
10
μ
s MIN
t
MASEL
t
HASET
t
HAHLD
t
ADSTA
t
DVGL
t
GHDX
t
AVQV
VERIFY MODE
PROGRAM MODE
VERIFY MODE
P0.2 (V
PP
)
P0.1 (PGM)
P0.0 (ASEL)
PORT 3
PORT 1
INVALID DATA
VALID DATA
DATA TO BE PROGRAMMED
INVALID DATA
VALID DATA
HIGH ADDRESS
LOW ADDRESS
SU00310
Figure 9. Program/Verify Cycle
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