SD60C31/P AUK [AUK corp], SD60C31/P Datasheet - Page 4

• Manufacturer Part Number: SD60C31/P
• Description: CMOS SINGLE-COMPONENT 8-BIT MICROCOMPUTER
• Manufacturer: AUK [AUK corp]

Pin Description(continued)
Port 1
Port 2
Port 3
RST
Port PIN
: PIN 9 (DIP40), PIN 10 (PLCC44)
P3.0
P3.1
P3.2
P3.3
P3.4
P3.5
P3.6
P3.7
: PIN 1~8 (DIP40), PIN 2~9 (PLCC44)
Port 1 is an 8-bit bi-directional I/O port with internal pullups.
: PIN 21~28 (DIP40), PIN 24~31 (PLCC44)
Reset input. A high on this pin for two machine cycles while the oscillator is
Port 1 pins that have 1's written to them are pulled high by the internal pullups,
and in that state can be used as inputs. As inputs, Port 1 pins that are externally
being pulled low will source current because of the internal pullups.
Port 2 is an 8-bit bi-directional I/O port with internal pullups. Port 2 pins that have
1's written to them are pulled high by the internal pullups, and in that state can
be used as inputs. As inputs, Port 2 pins that are externally being pulled low will
source current because of the internal pullups.
Port 2 emits the high-order address byte during fetches from external Program
Memory and during accesses to external Data Memory that use 16-bit addresses
(MOVX @ DPTR). In this application it uses strong internal pullups when emitting
1's. During accesses to external data memory that use 8-bit addresses (MOVX @
Ri), Port 2 emits the contents of the P2 Special Function Register
Port 3 is an 8-bit bi-directional I/O port with internal pullups. Port 3 pins that have
1's written to them are pulled high by the internal pullups, and in that state can
be used as inputs. As inputs, Port 3 pins that are externally being pulled low will
source current because of the pullups.
Port 3 also serves the function of various special feature of the MCS-51 Family, as
listed below :
running resets the device. An internal diffused resistor to V
reset using only an external capacitor to V
: PIN 10~17 (DIP40), PIN 13~19 (PLCC44)
PIN NO.
10
11
12
13
14
15
16
17
KSI-W001-000
RxD (Serial input port)
TxD (Serial output port)
INT0 (external interrupt 0)
INT1 (external interrupt 1)
T0 (Timer 0 external input)
T1 (Timer 1 external input)
WR (external data memory write strobe)
RD (external data memory read strobe)
CC
.
SD60C31/P SD60C51/P
Alternate Function
SS
permits Power-On
4