SH7101 Datasheet, PDF (400/486 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

13. Pin Function Controller (PFC)
13.1.5 Port E I/O Registers L and H (PEIORL and PEIORH)
PEIORL and PEIORH are 16-bit readable/writable registers that are used to set the pins on port E
as inputs or outputs. Bits PE21IOR to PE0IOR correspond to pins PE21 to PE0 (names of
multiplexed pins are here given as port names and pin numbers alone). PEIORL is enabled when
the port E pins are functioning as general-purpose inputs/outputs (PE15 to PE0), TIOC pins are
functioning as inputs/outputs of MTU, and SCK3 pins are functioning as inputs/outputs of SCI. In
other states, PEIORL is disabled. PEIORH is enabled when the port E pins are functioning as
general-purpose inputs/outputs (PE21 to PE16). In other states, PEIORH is disabled.
A given pin on port E will be an output pin if the corresponding PEIORL or PEIORH bit is set to
1, and an input pin if the bit is cleared to 0.
Bits 15 to 6 in PEIORH are reserved. These bits are always read as 0. The write value should
always be 0.
PEIORL and PEIORH are initialized to H'0000.
13.1.6 Port E Control Registers L1, L2, and H (PECRL1, PECRL2, and PECRH)
PECRL1, PECRL2 and PECRH are 16-bit readable/writable registers that are used to select the
multiplexed pin function of the pins on port E.
Rev.2.00 Sep. 27, 2007 Page 366 of 448
REJ09B0394-0200