Z86L81 Datasheet, PDF (68/88 Pages) Maxim Integrated Products – 28-Pin Low-Voltage Infrared Microcontrollers

Z86L81/86/98
28-Pin Low-Voltage Infrared Microcontrollers
62
5 Clock Filter
*CLR2
CLK
18 CGleonckerRaEtoSr ETRESET
CK Source
Select
(WDTMR)
XTAL
M
INTERNAL
U
RC
X
OSC.
V_DD
+
VBO/VLV _-
2V REF.
Low Operating
Voltage Det.
WDT TAP SELECT
POR 5 ms 10 ms 20 ms 80 ms
CLK
WDT/POR Counter Chain
*CLR1
Internal
RESET
Active
High
WDT
From Stop
V_CC
Mode
Recovery ^{12-ns Glitch Filter}
Source
Stop Delay
Select (SMR)
* CLR1 and CLR2 enable the WDT/POR and 18 Clock Reset timers upon a Low-to-High input translation.
Figure 34. Resets and WDT
WDTMR During STOP (D3)
This bit determines whether or not the WDT is active during STOP Mode.
Because the XTAL clock is stopped during STOP Mode, the on-board RC has to
be selected as the clock source to the WDT/POR counter. A 1 indicates active
during STOP. The default is 1.
Clock Source for WDT (D4)
This bit determines which oscillator source is used to clock the internal POR and
WDT counter chain. If the bit is a 1, the internal RC oscillator is bypassed and the
POR and WDT clock source is driven from the external pin, XTAL1. The default
configuration of this bit is 0, which selects the RC oscillator.
19-4615; Rev 0; 4/09