NEC V850E/PH2 User Manual page 73

(19) PCT4, PCT5 (Port CT) ... I/O
Port CT is a 2-bit I/O port in which input or output can be set for each port pin individually.
Besides functioning as a port, in control mode, these pins operate as control signal outputs
when memory is expanded externally.
The operation mode can be specified by the port CT mode control register (PMCCT) to port or
control mode for each port pin individually.
(a) Port mode
PCT4 and PCT5 can be set to input or output in 1-bit units using the port CT mode register
(PMCT).
(b) Control mode
PCT4 and PCT5 can be set to port or control mode in 1-bit units using the PMCCT register.
(i) RD (Read strobe) ... 3-state output
This is a strobe signal output pin that shows whether the bus cycle currently being executed is
a read cycle for the external memory or peripheral I/O extension area. In the idle state (TI), it
becomes inactive.
(ii) WR (Write strobe) ... 3-state output
This is a strobe signal output pin that shows whether the bus cycle currently being executed is
a write cycle for the external memory or peripheral I/O extension area.
Note: not available on μPD70F3447
Chapter 2 Pin Functions
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User's Manual U16580EE3V1UD00
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