SH7080 Datasheet, PDF (1270/1644 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer SuperH™ RISC engine Family

Section 22 I/O Ports
22.6.1 Register Descriptions
Port F is an 8-bit input-only port in the SH7083, SH7084, and SH7085; a 16-bit input-only port in
the SH7086. Port F has the following register. For details on register addresses and register states
during each processing, refer to section 27, List of Registers.
Table 22.11 Register Configuration
Register Name
Port F data register L
Abbrevia-
tion
R/W Initial Value Address
Access Size
PFDRL
R
H'xxxx
H'FFFFD382 8, 16
22.6.2 Port F Data Register L (PFDRL)
The port F data register L (PFDRL) is a 16-bit read-only register that stores port F data. Bits
PF7DR to PF0DR correspond to pins PF7 to PF0 (multiplexed functions omitted here) in the
SH7083, SH7084, and SH7085. Bits PF15DR to PF0DR correspond to pins PF15 to PF0
(multiplexed functions omitted here) in the SH7086.
Any value written into these bits is ignored, and there is no effect on the state of the pins. When
any of the bits are read, the pin state rather than the bit value is read directly. However, when an
A/D converter analog input is being sampled, values of 1 are read out. Table 22.12 summarizes
port F data register L read/write operations.
Rev. 3.00 May 17, 2007 Page 1212 of 1582
REJ09B0181-0300