NEC V850E/PH2 User Manual page 70

(13) PAH0 to PAH5 (Port AH) ... I/O
Port AH is a 6-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 the address bus (A16 to
A21) when memory is expanded externally.
The operation mode can be specified by the port AH mode control register (PMCAH) to port or
control mode for each port pin individually.
(a) Port mode
PAH0 to PAH5 can be set to input or output in 1-bit units using the port AH mode register (PMAH).
(b) Control mode
PAH0 to PAH6 can be set to port or control mode in 1-bit units using the PMCAH register.
(i) A16 to A21 (Address bus) ... 3-state output
These are the address output pins of the higher 6 bits of the 22-bit address bus when the
external memory is accessed.
(14) PDL0 to PDL15 (Port DL) ... I/O
Port DL is an 8-bit or a 16-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 the data bus (D0 to D15)
when memory is expanded externally.
The operation mode can be specified by the port DL mode control register (PMCDL) to port or
control mode for each port pin individually.
(a) Port mode
PDL0 to PDL15 can be set to input or output in 1-bit units using the port DL mode register (PMDL).
(b) Control mode
PDL0 to PDL15 can be set to port or control mode in 1-bit units using the PMCDL register.
(i) D0 to D15 (Address bus) ... 3-state I/O
These are the data I/O pins of the lower 16 bits of the 32-bit data bus when the external
memory is accessed.
Note: not available on μPD70F3447
70
Chapter 2 Pin Functions
Note
User's Manual U16580EE3V1UD00
Note