87C748 Philips Semiconductors, 87C748 Datasheet - Page 13

• Manufacturer Part Number: 87C748
• Description: 80C51 8-bit microcontroller family 2K/64 OTP/ROM/ low pin count
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1999 Apr 15
80C51 8-bit microcontroller family
2K/64 OTP/ROM, low pin count
P0.0 (ASEL)
P0.1 (PGM)
P0.2 (V
PORT 3
PORT 1
V
PP
PP
PROGRAMMING
/V
CLK SOURCE
)
IH
RESET
XTAL1
VOLTAGE
P0.2
P0.1
SOURCE
5V
PULSES
t
HASET
UNDEFINED
UNDEFINED
ADDRESS STROBE
MIN 2 MACHINE
INVALID DATA
CYCLES
HIGH ADDRESS
A0–A10
t
MASEL
VERIFY MODE
BIT 0
CONTROL
RESET
LOGIC
t
Figure 6. Entry into Program/Verify Modes
HAHLD
BIT 1
Figure 5. Programming Configuration
Figure 7. Program/Verify Cycle
t
AVGL
LOW ADDRESS
t
ADSTA
12.75V
VALID DATA
BIT 2
t
GLGH
BIT 3
98 s MIN
TEN BIT SERIAL CODE
13
t
SHGL
BIT 4
DATA TO BE PROGRAMMED
P3.0–P3.7
P0.0/ASEL
P0.1
P0.2
XTAL1
RESET
t
DVGL
PROGRAM MODE
10 s MIN
25 PULSES
BIT 5
87C748
t
GHDX
P1.0–P1.7
t
GHGL
BIT 6
V
V
CC
SS
BIT 7
INVALID DATA
BIT 8
t
5V
AVQV
t
GHSL
+5V
83C748/87C748
VERIFY MODE
BIT 9
Preliminary specification
DATA BUS
SU00301
VALID DATA
SU00302
SU00303