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ZGP323H Datasheet(PDF) 33 Page - Zilog, Inc.

Part No. ZGP323H
Description  Programmable input glitch filter for pulse reception
Download  107 Pages
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Maker  ZILOG [Zilog, Inc.]
Homepage  http://www.zilog.com
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ZGP323H Datasheet(HTML) 33 Page - Zilog, Inc.

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ZGP323H
Product Specification
PS023803-0305
Functional Description
25
Comparator Inputs
In analog mode, P31 and P32 have a comparator front end. The comparator refer-
ence is supplied to P33 and Pref1. In this mode, the P33 internal data latch and its
corresponding IRQ1 are diverted to the SMR sources (excluding P31, P32, and
P33) as indicated in Figure 12 on page 22. In digital mode, P33 is used as D3 of
the Port 3 input register, which then generates IRQ1.
Comparators are powered down by entering Stop Mode. For
P31–P33 to be used in a Stop Mode Recovery source, these
inputs must be placed into digital mode.
Comparator Outputs
These channels can be programmed to be output on P34 and P37 through the
PCON register.
RESET (Input, Active Low)
Reset initializes the MCU and is accomplished either through Power-On, Watch-
Dog Timer, Stop Mode Recovery, Low-Voltage detection, or external reset. During
Power-On Reset and Watch-Dog Timer Reset, the internally generated reset
drives the reset pin Low for the POR time. Any devices driving the external reset
line must be open-drain to avoid damage from a possible conflict during reset con-
ditions. Pull-up is provided internally.
When the Z8 GP asserts (Low) the RESET pin, the internal pull-up is disabled.
The Z8 GP does not assert the RESET pin when under VBO.
The external Reset does not initiate an exit from STOP mode.
Functional Description
This device incorporates special functions to enhance the Z8®’ functionality in
consumer and battery-operated applications.
Program Memory
This device addresses up to 32KB of OTP memory. The first 12 Bytes are
reserved for interrupt vectors. These locations contain the six 16-bit vectors that
correspond to the six available interrupts.
RAM
This device features 256B of RAM. See Figure 14.
Note:
Note:


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