Rainbow Electronics AT89C5132 - Manual (Page 11)

11
AT8xC5132
4173A–8051–08/02
Internal Pin Structure
Notes: 1. For information on resistors value, input/output levels, and drive capability, refer to the AT8xC5132 full Datasheet.
2. In Port 2, P
1
transistor is continuously driven when outputing a high level bit address (A15:8).
Table 15. Detailed Internal Pin Structure
Circuit (1) Type Pins
Input TST#
Input/Output RST
Input/Output
P1
P2 (3)
P3
P4
P53:0
Input/Output
P0
MCMD
MDAT
ISP#
Output
ALE
SCLK
DCLK
DOUT
DSEL
MCLK
Input/Output
D+
D-
RRS
T
VSS
P
VDD
Watchdog Output
P3
VSS
N
P1
VDD VDD
2 osc
Latch Output
periods
P2
VDD
VSS
N
P
VDD
VSS
N
P
VDD
D+
D-