Datasheet

Section 10 I/O Ports
Rev. 3.00 Mar 17, 2006 page 503 of 926
REJ09B0283-0300
10.13.6 Port E Input Pull-Up MOS States
Port E has a built-in input pull-up MOS function that can be controlled by software. This input
pull-up MOS function can be used in 8-bit bus mode. Input pull-up MOS can be specified as on or
off on a bit-by-bit basis. In 8-bit bus mode, when a PEDDR bit is cleared to 0, setting the
corresponding PEPCR bit to 1 turns on the input pull-up MOS for that pin.
Table 10.6 summarizes the input pull-up MOS states.
Table 10.6 Input Pull-Up MOS States (Port E)
Mode
*
Reset
Hardware
Standby Mode
Software
Standby Mode
In Other
Operations
8-bit bus On/Off On/Off1 to 7
16-bit bus
Off Off
Off Off
Legend:
Off: Input pull-up MOS is always off.
On/Off: On when PEDDR = 0 and PEPCR = 1; otherwise off.
Note: * Mode 3 is available only in H8S/2678R Group.
10.14 Port F
Port F is an 8-bit I/O port that also has other functions. The port F has the following registers. For
details on the port function control register 2, refer to section 10.3.5, Port Function Control
Register 2 (PFCR2).
• Port F data direction register (PFDDR)
• Port F data register (PFDR)
• Port F register (PORTF)
• Port Function Control Register 2 (PFCR2)