r4f2426 Renesas Electronics Corporation., r4f2426 Datasheet - Page 683

• Manufacturer Part Number: r4f2426
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Note:
Bit
0
*
Bit Name
PH0DDR
Not supported in the H8S/2426 Group.
Initial Value
0
R/W
W
Description
•
Pin PH1 functions as the SDRAMφ* output pin
when the SDPSTP bit is 0 in a product supporting
the SDRAM interface. In a product not supporting
the SDRAM interface or when the SDPSTP bit is
1, if bit CS5E is set to 1 while area 5 is specified
as normal space, pin PH1 functions as the CS5
output pin when bit PH1DDR is set to 1, and
functions as an I/O port when the bit is cleared to
0. When bit CS5E is cleared to 0, pin PH1 is an
I/O port, and its function can be switched with bit
PH1DDR. When area 5 is specified as DRAM
space and bit CS5E is set to 1, pin PH1 functions
as the RAS5 output pin and as an I/O port when
the bit is cleared to 0.
Pin PH0 functions as the CS4 output pin when
area 4 is specified as normal space and bit
PH0DDR is set to 1. If bit PH0DDR is cleared to 0,
pin PH0 functions as an I/O port. When bit CS4E
is cleared to 0, pin PH0 is an I/O port, and its
function can be switched with bit PH0DDR. When
area 4 is specified as DRAM space and bit CS4E
is set to 1, pin PH0 functions as the RAS4 output
pin and as an I/O port when the bit is cleared to 0.
When areas 2 to 5 are specified as continuous
SDRAM space*, pin PH0 functions as the WE
output pin when bit CS4E is set to 1, and as an I/O
port when the bit is cleared to 0.
Mode 7 (when EXPE = 0)
Pins PH3 to PH0 are I/O ports, and their functions
can be switched with PHDDR.
Pin PH1 functions as the SDRAMφ output pin
when the SDPSTP bit is 0 in a product supporting
the SDRAM interface. In a product not supporting
the SDRAM interface or when the SDPSTP bit is
1, pin PH1 is an I/O port and its function can be
switched with PHDDR.
Rev. 1.00 Sep. 19, 2008 Page 655 of 1270
Section 10 I/O Ports
REJ09B0466-0100