tn87c196kd20 ETC-unknow, tn87c196kd20 Datasheet - Page 9

• Manufacturer Part Number: tn87c196kd20
• Description: Commercial Chmos Microcontroller
• Manufacturer: ETC-unknow

PIN DESCRIPTIONS
Port 0
Port 1
Port 2
Ports 3 and 4
HOLD
HLDA
BREQ
PMODE
PACT
PALE
PROG
PVER
CPVER
AINC
Symbol
8-bit high impedance input-only port. These pins can be used as digital inputs and/or as
analog inputs to the on-chip A/D converter.
8-bit quasi-bidirectional I/O port.
8-bit multi-functional port. All of its pins are shared with other functions in the 8XC196KD.
Pins 2.6 and 2.7 are quasi-bidirectional.
8-bit bidirectional I/O ports with open drain outputs. These pins are shared with the
multiplexed address/data bus which has strong internal pullups.
Bus Hold input requesting control of the bus.
Bus Hold acknowledge output indicating release of the bus.
Bus Request output activated when the bus controller has a pending external memory
cycle.
Determines the EPROM programming mode.
A low signal in Auto Programming mode indicates that programming is in process. A high
signal indicates programming is complete.
A falling edge in Slave Programming Mode and Auto Configuration Byte Programming
Mode indicates that ports 3 and 4 contain valid programming address/command
information (input to slave).
A falling edge in Slave Programming Mode indicates that ports 3 and 4 contain valid
programming data (input to slave).
A high signal in Slave Programming Mode and Auto Configuration Byte Programming
Mode indicates the byte programmed correctly.
Cummulative Program Output Verification. Pin is high if all locations have programmed
correctly since entering a programming mode.
Auto Increment. Active low input enables the auto increment mode. Auto increment allows
reading or writing sequential EPROM locations without address transactions across the
PBUS for each read or write.
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Name and Function
8XC196KD/8XC196KD20
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