SH7721 datasheet(615/1524 Pages) RENESAS

615 / 1524 page

Section 16 Compare Match Timer (CMT)

Rev. 3.00 Jan. 18, 2008 Page 553 of 1458

REJ09B0033-0300

Bit

Bit Name

Initial

Value

R/W

Description

CKS2

CKS1

CKS0

R/W

Clock Select 2 to 0

These bits select the clock input to CMCNT. When the

STRn (n: 4 to 0) bit in CMSTR is set to 1, CMCNT begins

incrementing with the clock selected by these bits.

000: P

φ/8

001: P

φ/32

010: P

φ/128

011: Setting prohibited

100: Setting prohibited

101: Setting prohibited

110: Setting prohibited

111: Setting prohibited

Note:

Only 0 can be written to clear the flag.

16.2.3

Compare Match Timer Counter (CMCNT)

CMCNT is a 32-bit register that is used as an up-counter.

A counter operation is set by the compare match timer control/status register (CMCSR).

Therefore, set CMCSR first, before starting a channel operation corresponding to the compare

match timer start register (CMSTR). When the 16-bit counter operation is selected by the CMS

bit, bits 15 to 0 of this register become valid. When the register should be written to, write the data

that is added H'0000 to the upper half in a 32-bit operation. The contents of this register are

initialized to H'00000000.

16.2.4

Compare Match Timer Constant Register (CMCOR)

CMCOR is a 32-bit register that sets the compare match period with CMCNT for each channel.

When the 16-bit counter operation is selected by the CMS bit in CMCSR, bits 15 to 0 of this

to the upper half in a 32-bit operation.

An overflow is detected when CMCNT is cleared to 0 and this register is H'FFFFFFFF. The

contents of this register are initialized to H'FFFFFFFF.

SH7721 Datasheet(PDF) 615 Page - Renesas Technology Corp

SH7721 Datasheet(HTML) 615 Page - Renesas Technology Corp

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL