83C754 Datasheet, PDF (23/26 Pages) NXP Semiconductors – 80C51 8-bit microcontroller family 4K/256 OTP/ROM, DAC, comparator, UART, reference

Philips Semiconductors
80C51 8-bit microcontroller family
4K/256 OTP/ROM, DAC, comparator, UART, reference
Preliminary specification
83C754/87C754
XTAL1
RESET
MIN 2 MACHINE
CYCLES
BIT 0 BIT 1
BIT 2
TEN BIT SERIAL CODE
BIT 3 BIT 4
BIT 5
BIT 6 BIT 7 BIT 8
BIT 9
V_PP UNDEFINED
PGM UNDEFINED
Figure 21. Entry into Program/Verify Modes
SU00721
V_PP
5V
12.75V
t_SHGL
5 PULSES
PGM
ASEL
t_MASEL
t_GLGH
98µs MIN
t_GHGL
10µs MIN
A0–A10
D0–D7
t_HASET
HIGH ADDRESS
t_HAHLD
LOW ADDRESS
INVALID DATA
VERIFY MODE
t_ADSTA
VALID DATA
t_DVGL t_GHDX
DATA TO BE PROGRAMMED
PROGRAM MODE
Figure 22. Program/Verify Cycle
5V
t_GHSL
t_AVQV
INVALID DATA
VALID DATA
VERIFY MODE
SU00683A
1998 Apr 23
23