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Z86319 Datasheet

  • Z86319

  • PS/2 MOUSE CONTROLLER

  • 23頁

  • ZILOG   ZILOG

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P
RELIMINARY
P
RODUCT
S
PECIFICATION
1
Z86319
PS/2 M
OUSE
C
ONTROLLER
FEATURES
Device
Z86319
ROM
(KB)
2
RAM*
(Bytes)
125
I/O
Lines
13
Voltage
Range
4.5V to 5.5V
s
1
P24-P27 Can Be Configured with a Voltage Divider
During Input Mode
On-Chip Oscillator (Tolerance =
鹵
10%)
Fast Instruction Pointer: 1.5
碌
s @ 4 MHz
ESD Protection Circuitry
Hardwired Watch-Dog Timer (WDT)
Excellent System Level EMI/EFT/ESD
s
s
Note:
*General-Purpose (144K Total RAM)
s
s
0
擄
C to + 40
擄
C Operating Temperature Range
Low-Power Consumption: 25 mW (Typical)
s
s
s
GENERAL DESCRIPTION
The Z86319 is a member of the Z8 family of CMOS micro-
controllers architecture to be used in mouse applications.
These devices offer on-board pull-up and pull-down resis-
tors, a trip-point buffer to accommodate opto-transistor
outputs, and high drive ports capable of up to 10 mA cur-
rent sinking per pin (3 pins maximum).
A permanently enabled Watch-Dog Timer ensures opera-
tional reliability across a broad range of mouse application
environments. The precision RC oscillator filters out high-
frequency noise from the oscillator input pin. When config-
ured as inputs, P24-P27 have built in voltage dividers (25K
pull-up /7.5K pull-down). The input levels are designed for
connection to the emitters of the opto-transistors and
switch at a voltage level of 0.4 V
DD
.
For applications requiring powerful I/O capabilities, the
Z86319 provides dedicated input and output lines that are
grouped into three ports. There are two basic address
spaces available to support this configuration: Program
Memory, and 125 bytes of general-purpose registers.
The Z86319 device provides two on-chip 8-bit programma-
ble counter/timers with a large number of user-selectable
modes. Each counter/timer is driven by its own 6-bit pro-
grammable prescaler. The Z86319 counter/timers off-load
system real-time tasks such as counting/timing and in-
put/output data communications for increased system effi-
ciency.
DS97KEY1605
PRELIMINARY
1

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