SH7055S Datasheet, PDF (271/1002 Pages) Renesas Technology Corp – Renesas 32-Bit RISC Microcomputer SuperH RISC engine Family/SH7000 Series

• Bit 3—Reserved: This bit is always read as 0. The write value should always be 0.
• Bits 2 to 0—Clock Select A2 to A0, C2 to C0 (CKSELA2 to CKSELA0, CKSELC2 to
CKSELC0): These bits select clock φ", scaled from the internal clock source, from φ', φ'/2,
φ'/4, φ'/8, φ'/16, and φ'/32.
Bit 2:
CKSELx2
0
1
x = A or B
Bit 1
CKSELx1
0
1
0
1
Bit 0
CKSELx0
0
1
0
1
0
1
0
1
Description
Internal clock φ": counting on φ'
Internal clock φ": counting on φ'/2
Internal clock φ": counting on φ'/4
Internal clock φ": counting on φ'/8
Internal clock φ": counting on φ'/16
Internal clock φ": counting on φ'/32
Setting prohibited
Setting prohibited
(Initial value)
Timer Control Register 8 (TCR8)
Bit:
Initial value:
R/W:
7
6
5
4
3
2
1
0
— CKSELB2 CKSELB1 CKSELB0 — CKSELA2 CKSELA1 CKSELA0
0
0
0
0
0
0
0
0
R
R/W
R/W
R/W
R
R/W
R/W
R/W
The CKSELAx bits relate to DCNT8A to DCNT8H, and the CKSELBx bits relate to DCNT8I to
DCNT8P.
Rev.2.0, 07/03, page 233 of 960