ZILOG Z86250 Datasheet
FEATURES
Z86250
CP96TEL0302
CUSTOMER PROCUREMENT SPECIFICATION
Z86250
STARSIGHT DATABASE ENGINE
■ Part Package Speed (MHz)
Z86250 84-Pin PLCC 24
■ 4.3- to 5.5-Volt Operating Range
■ 0°C to +70°C Temperature Range
■ Low-Power Consumption
■ Segmented Base Registers
GENERAL DESCRIPTION
Zilog's Z86250 StarSight Data Base Engine (DBE) is
designed to process extracted data for the StarSight
on-screen programming guide. The device is logically
equivalent to the DBE1200 for StarSight applications.
The Z86250 provides a number of important peripheral
functions, such as the IR Blaster to send command signals
to the VCR, and low-power management to avoid loss of
data.
■ Infrared Receiver Logic
■ CRC-32 Encoding and Decoding Logic
■ Watch-Dog Timer (WDT) for Error Recovery
■ Serial I.M. and I2C Compatible Bus for External
Communication
■ Test Multiplexer for Chip Debug
For fast memory data manipulation, the Z86250 offers
segmented base registers. The device also features
PSRAM memory control and refresh logic.
The DBE is optimized to work with Zilog's Z89300 series of
TV controller devices to provide a cost-effective solution
for StarSight programming-guide data extraction and
display.
Notes:
All Signals with a preceding front slash, "/", are active Low, e.g.:
B//W (WORD is active Low); /B/W (BYTE is active Low, only).
CP96TEL0302 (2/96)
Power connections follow conventional descriptions below:
Connection Circuit Device
Power V
Ground GND V
CC
V
DD
SS
1
GENERAL DESCRIPTION (Continued)
Z86250
CP96TEL0302
Database Engine Block Diagram
2
PIN DESCRIPTION
2
P
P
I
K
P
PIRR/RDY
PIRR/CLK
PIRRDTA
PB1/INC
PBANDO
PTESTOUT
PXRFSH18
PRAM/A16
PRAM/A15
VDD
PRAM/A14
GND
PCE2/A17
PRAM/A12
PRAM/A7
PRF/SEL0
PERF/SEL1
PPERF/SEL
PPWM/OUT
PSPARE
PXLPWARN
Z86250
CP96TEL0302
11 75
PX/RESET
12
P/IM/DATA
PIM/CLK
PIMI/DEN
XRAMWE1
XRAMWE0
PRAM/A13
PRAM/A8
PRAM/A6
PRAM/A9
GND2
84-Pin PLCC
VDD2
PRAM/A5
PRAM/A11
PRAM/A4
PRAM/A10
PXRAMOE0
PXRAMOE1
PXCE1
P6805CLK
POSC/2
32
33
184
Z86250
42 43
74
PBAND2
PISB/DTA
PISB/CLK
P/A7
P/A6
P/A5
P/A4
PXTAL2
PXTAL1
VDD4
GND4
P/A3
P/A2
P/A1
P/A0
PIR/XCL
P/A8
P/A9
P/A10
P/A11
54
P/A12
53
P/XRD
P/XWR
PXISBINT
DRAM/EN
PUPRESET
P/AD2
P/AD1
P/AD0
PXENBASE
Z86250 84-Pin PLCC
Pin Assignments
GND3
P/AD3
VDD3
P/AD4
P/AD6
P/AD5
P/ALE
P/AD7
P/A15
P/XPSEN
P/A14
P/A13
3
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