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User Guide V0.90
Philips 8051 FLASH Microcontroller - ISP Notes
C3
Vcc
Active High
RESET
RESET Circuit
Philips
89C51Rx
Microcontroller
P3
6
P3.2-P3.7
P2
USER
7
P2.0-P2.6
I/O
P0
8
P0.0-P0.7
XTAL1
XT1
XTAL2
GND
C1
C2
PROG-RESET
Vcc
PROG-VCC
C4
R1
U1
D1
D2
PROG-ACTIVE
J1
PROG-VPP
EA
R2
C5
P2.7
USER-INPUT
ALE
N/C
PROG-PSEN
PSEN
P3.0
RXD
PROG-TXD
P3.1
TXD
PROG-RXD
R3
PROG-GROUND
U2
RS-232
Transceiver
User RS-232
Port
21
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