ZLR64400ROMMCU datasheet(84/155 Pages) ZILOG

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PS024502-1205

P R E L I M I N A R Y

Counter/Timer Registers

ZLR64400 ROM MCU

Product Specification

Counter/Timer 8 Control Register

The Counter/Timer 8 Control Register controls the timer function of the T8 timer. This

Bank D register is described in Table 35.

Writing a 1 to CTR0[5] is the only way to reset the Terminal Count status condition. Re-

set this bit before using/enabling the counter/timers.

Be careful when using the OR or AND commands to manipulate CTR0, bit 5 and CTR1,

bits 0 and 1 (Demodulation Mode). These instructions use a Read-Modify-Write se-

quence in which the current status from the CTR0 and CTR1 registers is ORed or AND-

ed with the designated value and then written back into the registers.

Example: When the status of bit 5 is 1, a timer reset condition occurs.

Table 35. Counter/Timer 8 Control Register (CTR0)

Bit

Field

T8_Enable

Single/

Modulo-N

Time_Out T8 _Clock

Capture_INT_M

ask

Counter_INT_M

ask

P34_Out

Reset

R/W

R/W R/W

R/W

Address

Bank D: 00h; Linear: D00h

Bit

Position

Value Description

[7]

T8_EnableDisable/enable the T8 counter.

Disable counter.

Enable counter. Configure T8 properly before enabling it.

[6]

Single Pass/Modulo-N

MODULO-N mode. Counter reloads the initial value when terminal count is reached

Single-Pass mode. Counter stops when the terminal count is reached

[5]

Read:

Write:

Time_OutThis bit is set when the T8 terminal count is reached.

No counter time-out occurs.

Counter time-out occurred.

No effect.

Reset flag to 0. Software must reset this flag before using counter/timers.

Caution:

Note:

ZLR64400ROMMCU Datasheet(PDF) 84 Page - Zilog, Inc.

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