Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 489 of 926
REJ09B0283-0300
10.9.8 Port A Input Pull-Up MOS States
Port A has a built-in input pull-up MOS function that can be controlled by software. This input
pull-up MOS function can be used by pins PA7 to PA5 in modes 1, 2, 5, and 6, and by all pins in
modes 3
*
, 4, and 7. Input pull-up MOS can be specified as on or off on a bit-by-bit basis.
Table 10.2 summarizes the input pull-up MOS states.
Table 10.2 Input Pull-Up MOS States (Port A)
Mode Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
3
*
, 4, 7 PA7 to PA0 On/Off On/Off
PA7 to PA5 On/Off On/Off1, 2, 5, 6
PA4 to PA0
Off Off
Off Off
Legend:
Off: Input pull-up MOS is always off.
On/Off: On when PADDR = 0 and PAPCR = 1; otherwise off.
Note: * Only in H8S/2678R Group.
10.10 Port B
Port B is an 8-bit I/O port that also has other functions. The port B has the following registers.
• Port B data direction register (PBDDR)
• Port B data register (PBDR)
• Port B register (PORTB)
• Port B pull-up MOS control register (PBPCR)