ZLP32300P2016G datasheet(44/99 Pages) ZILOG

44 / 99 page

Crimzon® ZLP32300

Product Specification

PS020823-0208

Functional Description

T16 TRANSMIT Mode

In NORMAL or PING-PONG mode, the output of T16 when not enabled, is dependent on

CTR1, D0. If it is a 0, T16_OUT is a 1; if it is a 1, T16_OUT is 0. You can force the output

of T16 to either a 0 or 1 whether it is enabled or not by programming CTR1 D3; D2 to a 10

or 11.

When T16 is enabled, TC16H * 256 + TC16L is loaded, and T16_OUT is switched to its

initial value (CTR1, D0). When T16 counts down to 0, T16_OUT is toggled (in NOR-

MAL or PING-PONG mode), an interrupt (CTR2, D1) is generated (if enabled), and a sta-

tus bit (CTR2, D5) is set, see Figure 23.

Figure 23. 16-Bit Counter/Timer Circuits

Global interrupts override this function as described in Interrupts on page 43.

If T16 is in SINGLE-PASS mode, it is stopped at this point (see Figure 24). If it is in

MODULO-N mode, it is loaded with TC16H * 256 + TC16L, and the counting continues

(see Figure 25).

You can modify the values in TC16H and TC16L at any time. The new values take effect

when they are loaded.

CTR2 D1

Negative Edge

Positive Edge

Z8 Data Bus

IRQ3

CTR2 D2

SCLK

Z8 Data Bus

CTR2 D4, D3

Clock

T16_OUT

LO16

TC16H

TC16L

Clock

Select

16-Bit

Counter T16

HI16

Note:

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