upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 47

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(4) P30 to P37 (Port 3) ··· 3-state I/O
P30 to P37 constitute an 8-bit I/O port that can be set to input or output in 1-bit units.
P30 to P37 can also function as input or output pins for the timer/counter, and an address bus (A13 to A15) when
memory is expanded externally.
(a) Port function
(b) Alternate functions
P30 to P37 can be set to input or output in 1-bit units using the port 3 mode register (PM3).
(i)
(ii) TO0, TO1, TO4, TO5 (Timer output 0, 1, 4, 5) ··· output
(iii) A13 to A15 (Address 13 to 15) ··· output
TI00, TI01, TI10, TI11, TI4, TI5 (Timer input 00, 01, 10, 11, 4, 5) ··· input
These are the external count clock input pins of timer 0, timer 1, timer 4, and timer 5.
These are the pulse signal output pins of timer 0, timer 1, timer 4, and timer 5.
These comprise an address bus that is used for external access. These pins operate as the A13 to A15
bit address output pins within a 22-bit address. The output changes in synchronization with the rising
edge of the clock in the T1 state of the bus cycle. When the timing sets the bus cycle to inactive, the
previous bus cycle’s address is retained.
CHAPTER 2 PIN FUNCTIONS
User’s Manual U12768EJ4V1UD
47