AP160 AMICC [AMIC Technology], AP160 Datasheet - Page 4

• Manufacturer Part Number: AP160
• Description: 8-BIT MICROCONTROLLER WITH 8KB OTP
• Manufacturer: AMICC [AMIC Technology]

PIN DESCRIPTIONS
Version 0.0
P0.0-P0.7
P1.0-P1.7
P2.0-P2.7
P3.0-P3.7
SYMBOL
VSS
VCC
RST
TYPE
I/O
I/O
I/O
I/O
I
I
I
Ground.
Supply voltage.
Port 0 is an 8-bit open drain, bidirectional I/O port. When 1s are written to port 0 pins, the pins
can be used as high-impedance inputs. Port 0 can also be configured to be the multiplexed
low-order address/data bus during accesses to external program and data memory. In this
mode, P0 has internal pullups. Port 0 also receives the code bytes during programming on-chip
OTP EPROM and outputs the code bytes during program verification. External pullups are
required during program verification.
Port 1 is an 8-bit bidirectional I/O port with internal pullups. The Port 1 output buffers can
sink/source four TTL inputs. When 1s are written to Port 1 pins, they are pulled high by the
internal pullups and can be used as inputs. As inputs, Port 1 pins that are externally being
pulled low will source current (
can be configured to be the timer/counter 2 external count input (P1.0/T2) and the timer/counter
2 trigger input (P1.1/T2EX), respectively, as shown in the following:
T2 (P1.0): Timer/Counter 2 external count input/clockout (see Programmable Clock-Out)
T2EX (P1.1): Timer/Counter 2 Reload/Capture/Direction control.
Port 1 also receives the low-order address bytes during programming on-chip OTP EPROM
and verification.
Port 2 is an 8-bit bidirectional I/O port with internal pullups. The Port 2 output buffers can
sink/source four TTL inputs. When 1s are written to Port 2 pins, they are pulled high by the
internal pullups and can be used as inputs. As inputs, Port 2 pins that are externally being
pulled low will source current (
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, Port 2 uses strong
internal pullups when emitting 1s. 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 2
also receives the high-order address bits and some control signals during programming on-chip
OTP EPROM and verification.
Port 3 is an 8-bit bidirectional I/O port with internal pullups. The Port 3 output buffers can
sink/source four TTL inputs.When 1s are written to Port 3 pins, they are pulled high by the
internal pullups and can be used as inputs. As inputs, Port 3 pins that are externally being
pulled low will source current (
various special features of the AP160, as shown below:
RXD (P3.0): Serial input port
TXD (P3.1): Serial output port
INT0 (P3.2): External interrupt
INT1 (P3.3): External interrupt
T0 (P3.4): Timer 0 external input
T1 (P3.5): Timer 1 external input
WR (P3.6): External data memory write strobe
RD (P3.7): External data memory read strobe
Port 3 also receives some control signals for programming and verification.
Reset input. A high on this pin for two machine cycles while the oscillator is running resets the
device.
I ) because of the internal pullups. Port 2 emits the high-order
I ) because of the internal pullups. In addition, P1.0 and P1.1
I ) because of the pullups. Port 3 also serves the functions of
IL
IL
IL
4
DESCRIPTIONS
AMIC Technology, Inc.
AP160