L8708H datasheet(48/66 Pages) ZILOG

48 / 66 page

Z86L88/81/86/87/89/73

IR/Low-Voltage Microcontroller

P R E L I M I N A R Y

DS96LV00800

Port Configuration Register (PCON). The PCON regis-

ter configures the comparator output on Port 3. It is locat-

ed in the expanded register file at Bank F, location 00 (Fig-

ure 38).

Comparator Output Port 3 (D0). Bit 0 controls the comparator

used in Port 3. A 1 in this location brings the comparator

outputs to P34 and P37, and a 0 releases the Port to its

standard I/O configuration.

Stop-Mode Recovery Register (SMR). This register se-

lects the clock divide value and determines the mode of

Stop-Mode Recovery (Figure 39). All bits are write only ex-

cept bit 7, which is read only. Bit 7 is a flag bit that is hard-

ware set on the condition of STOP recovery and reset by

a power-on cycle. Bit 6 controls whether a low level or a

high level is required from the recovery source. Bit 5 con-

trols the reset delay after recovery. Bits D2, D3, and D4, or

the SMR register, specify the source of the Stop-Mode Re-

covery

signal.

Bits

determines

SCLK/TCLK are divided by 16 or not. The SMR is located

in Bank F of the Expanded Register Group at address

0BH.

Figure 38. Port Conﬁguration Register (PCON)

(Write Only)

Reserved (Must be 1)

D4 D3

PCON (FH) 00H

Comparator Output Port 3

0 P34, P37 Standard Output*

1 P34, P37 Comparator Output

* Default Setting After Reset

Figure 39. Stop-Mode Recovery Register

Figure 40. SCLK Circuit

D7 D6 D5 D4 D3 D2 D1 D0

SMR (F) 0B

SCLK/TCLK Divide-by-16

0 OFF

1 ON

Reserved (Must be 0)

Stop-Mode Recovery Source

000

001

010

011

100

101

11 0

111

Stop Delay

0 OFF

1 ON

Stop Recovery Level

0 Low

1 High

Stop Flag

0 POR

1 Stop Recovery

* Default Setting After Reset

** Default Setting After Reset and Stop-Mode Recovery

POR Only

Reserved

P31

P32

P33

P27

P2 NOR 0-3

P2 NOR 0-7

SMR, D0

÷ 2

÷16

OSC

SCLK

TCLK

L8708H Datasheet(PDF) 48 Page - Zilog, Inc.

L8708H Datasheet(HTML) 48 Page - Zilog, Inc.

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