z86l0408ssc ZiLOG Semiconductor, z86l0408ssc Datasheet - Page 13

• Manufacturer Part Number: z86l0408ssc
• Description: Z8 8-bit Cost-effective Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Zilog
Comparator Inputs. Two analog comparators are added
to input of Port 3, P31 and P32, for interface flexibility. The
comparators reference voltage P33 (REF) is common to
both comparators.
Typical applications for the on-board comparators; Zero
crossing detection, A/D conversion, voltage scaling, and
threshold detection. In analog mode, P33 input functions
serve as a reference voltage to the comparators.
FUNCTIONAL DESCRIPTION
The following special functions have been incorporated
into the Z86L04/L08 devices to enhance the standard Z8
core architecture to provide the user with increased design
flexibility.
DS97LVO0901
(Cold Start)
(Stop Mode)
POR
P27
Figure 10. Internal Reset Configuration
P R E L I M I N A R Y
Delay Line
INT OSC
T
POR
ms
The dual comparator (common inverting terminal) features
a single power supply which discontinues power in STOP
mode. The common voltage range is 0-4V when the V
is 5.0V; the power supply and common mode rejection ra-
tios are 90 dB and 60 dB, respectively.
Interrupts are generated on either edge of Comparator 2's
output, or on the falling edge of Comparator 1's output.
The comparator output is used for interrupt generation,
Port 3 data inputs, or T
comparators can be disabled, freeing the reference input
(P33) for use as IRQ1 and/or P33 input.
RESET. This function is accomplished by means of a Pow-
er-On Reset or a Watch-Dog Timer Reset. Upon power-
up, the Power-On Reset circuit waits for T
clock cycles, then starts program execution at address
000C (Hex) (Figure 10). The control registers' reset values
are shown in Table 3.
Reset Filter
XTAL OSC
18 CLK
Z8 8-Bit Cost-Effective Microcontrollers
IN
through P31. Alternatively, the
Reset
Chip
POR
Z86L04/L08
ms, plus 18
CC
13
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