Refresh Timer Counter (Rtcnt) - Hitachi SH7095 Hardware User Manual

• Bits 5–3—Clock Select Bits (CKS2–CKS0)
Bit 5: CKS2 Bit 4: CKS1
0 0
1
1 0
1
• Bits 2–0—Reserved bits: These bits always read 0.
7.2.6

Refresh Timer Counter (RTCNT)

Bit:
Bit name:
Initial value:
R/W:
Bit:
Bit name:
Initial value:
R/W:
The 8-bit counter RTCNT counts up with input clocks. The clock select bit of RTCSR selects an
input clock. RTCNT values can always be read/written by the CPU. When RTCNT matches
RTCOR, RTCNT is cleared. Returns to 0 after it counts up to 255.
• Bits 15–8 always read 0.
Bit 3: CKS0
0
1
0
1
0
1
0
1
15 14
— —
0 0
R R
7 6
0 0
R/W R/W R/W
Description
Disables count up (Initial value)
CLK/4
CLK/16
CLK/64
CLK/256
CLK/1024
CLK/2048
CLK/4096
13 12 11
— — —
0 0
R R
5 4
0 0
R/W R/W
10
— —
0 0
R R
3 2
0 0
R/W R/W
9 8
—
0 0
R R
1 0
0 0
R/W
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