R8CSLASH13 datasheet(102/224 Pages) RENESAS

102 / 224 page

Rev.1.20

Jan 27, 2006

page 91 of 205

REJ09B0111-0120

R8C/13 Group

12.3.1 Timer Mode

In this mode, the timer counts an internally generated count source or Timer Y underflow (see “Table

12.9 Timer Mode Specifications”). The TZSC register is unused in timer mode. Figure 12.22 shows

the TYZMR register and PUM register in timer mode.

Item

Specification

Count source

f1, f2, f8, Timer Y underflow

Count operation

• Down-count

• When the timer underflows, it reloads the reload register contents before continuing

counting (When the Timer Z underflows, the contents of the Timer Z primary reload

Divide ratio

1/(n+1)(m+1)

n: set value in PREZ register, m: set value in TZPR register

Count start condition

Write “1” (count start) to TZS bit in TYZMR register

Count stop condition

Write “0” (count stop) to TZS bit in TYZMR register

Interrupt request

• When Timer Z underflows [Timer Z interrupt]

generation timing

TZOUT pin function

Programmable I/O port

_______

INT0 pin function

______

Programmable I/O port, or INT0 interrupt input

Read from timer

Count value can be read out by reading TZPR register.

Same applies to PREZ register.

Write to timer(1)

Value written to TZPR register is written to both reload register and counter or written to

reload register only. Selected by program.

Same applies to PREZ register.

NOTES:

1. The IR bit in the TZIC register is set to "1" (interrupt requested) if you write to the TZPR or PREZ register while both

of the following conditions are met.

• TZWC bit in TYZMR register is set to "0" (write to reload register and counter simultaneously)

• TZS bit in TYZMR register is set to "1" (count start)

To write to the TZPR or PREZ register in the above state, disable interrupts before the writing.

Table 12.9 Timer Mode Specifications

12.3 Timer (Timer Z)

R8C/13 Datasheet(PDF) 102 Page - Renesas Technology Corp

R8C/13 Datasheet(HTML) 102 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