r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 662

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

Section 10 I/O Ports
SSUMS
BIDE
MSS
TE
RE
Pin
state
Legend:
: Pin is not used by the SSU (can be used as I/O port)
• PF2/CS6/LCAS/SSI0-C (H8S/2454 Group)
• Modes 1, 2, 4, and 7 (EXPE = 1)
Rev. 1.00 Sep. 19, 2008 Page 632 of 1342
REJ09B0467-0100
Areas 2 to 5
CS6E
SSU settings
PF2DDR
Pin function
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bits MSS and BIDE in SSCRH, bit SSUMS in SSCRL, and bits TE and RE
in SSER of SSU, bits RMTS2 to RMTS0 in DRAMCR of the bus controller, bit CS6E in
PFCR0, bits SSI0S1 and SSI0S0 in PFCR5, bits ABW5 to ABW2 in ABWCR, and bit
PF2DDR.

0
1
Output Output Input 
0
0
synchronous DRAM
space area is 16-bit
1
LCAS output
Any DRAM/
1
bus space
0
0



0
1
1
0
1
Input
1
Can be used as
input
PF2
0
8-bit bus space, or areas 2 to 5 are all normal space
I/O port

0
1
All DRAM/synchronous DRAM space areas are
SSI pin settings
0
output

1
0
PF2
1
0
1

0
1
1
0
SSI0-C
input*
Input
state

1
0
0
Input
1
0
1
output*
SSI0-C
Output
state

0
0

1
Input Input
2
1
1
0
input
PF2
0
0
1

1

1
0
output
CS6
1
1
Input
1