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SH7052 Scheda tecnica(PDF) 458 Page - Renesas Technology Corp

Il numero della parte SH7052
Spiegazioni elettronici  SuperHTM RISC engine
PDF  919 Pages
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Produttore elettronici  RENESAS [Renesas Technology Corp]
Homepage  http://www.renesas.com
Logo RENESAS - Renesas Technology Corp

SH7052 Scheda tecnica(HTML) 458 Page - Renesas Technology Corp

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• Bits 1 and 0—Clock Select 1 and 0 (CKS1, CKS0): These bits select the clock input to
CMCNT from among the four internal clocks obtained by dividing the peripheral clock (P
φ).
When the STR bit of CMSTR is set to 1, CMCNT begins incrementing with the clock selected
by CKS1 and CKS0.
Bit 1: CKS1
Bit 0: CKS0
Description
00P
φ/8
(Initial value)
1P
φ/32
10P
φ/128
1P
φ/512
13.2.3
Compare Match Timer Counter (CMCNT)
The compare match timer counter (CMCNT) is a 16-bit register used as an up-counter for
generating interrupt requests.
When an internal clock is selected with the CKS1 and CKS0 bits of the CMCSR register and the
STR bit of CMSTR is set to 1, CMCNT begins incrementing with that clock. When the CMCNT
value matches that of the compare match timer constant register (CMCOR), CMCNT is cleared to
H'0000 and the CMF flag of CMCSR is set to 1. If the CMIE bit of CMCSR is set to 1 at this time,
a compare match interrupt (CMI) is requested.
CMCNT is initialized to H'0000 by a power-on reset and in the standby modes. It is not initialized
by a manual reset.
Bit:
15
14
13
12
11
10
9
8
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Bit:
7
6
5
4
3
2
1
0
Initial value:
0
0
0
0
0
0
0
0
R/W:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W



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