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Z90231 Datasheet, PDF (1/9 Pages) Zilog, Inc. – Z8 DIGITAL TELEVISION CONTROLLERS
PRELIMINARY DATA SHEET
Z90231/233/234/239
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Z8 DIGITAL TELEVISION CONTROLLERS
FEATURES
Device
ROM
(KB)
RAM I/O
(Bytes) Lines1
Voltage
Range
Z90231 32(OTP) 236
Z90233
16
236
Z90234
24
236
Z90239 32(ext.) 236
27 4.5V to 5.5V
27 4.5V to 5.5V
27 4.5V to 5.5V
27 4.5V to 5.5V
Note:  +V EQWPVU CNN OWZGF +1 RQTV
Z8-Based CMOS Microcontroller for Consum-
er Television, Cable Box, and Satellite Re-
ceiver Applications
‡ 42-Pin SDIP Package except Z90239 (124 PGA)
‡ Z8® MCU Core at 6 MHz
‡ Mask ROM sizes Available in 16 and 24KB
‡ Ten 6-bit Pulse Width Modulators
‡ One 14-bit Pulse Width Modulator
‡ On-Chip Infrared (IR) Capture Registers
‡ Four Channel 4-bit Analog-to-Digital Converter
‡ Twenty Seven General Purpose I/O Pins
‡ I2C Master Serial Communication Port
On Screen Display (OSD) Section
‡ Supports Displays up to 10 rows by 24 Columns with
256 Characters
‡ Character Cell Resolution of 14 Pixels by 18 Scan lines
‡ Variable Inter-row Spacing from 0–15 Horizontal Scan
Lines
‡ Foreground and Background Colors Fully Programma-
ble by Character
GENERAL DESCRIPTION
The Z9023X Digital Television Controller (DTC) family is
ZiLOG’s latest and most powerful Z8-based DTC product
offering. These parts feature larger system RAM and ROM
options, together with a host of new features including a new
color palette system, flexible inter-row spacing, higher
character cell resolution, background mesh effect, dedicated
I.R. capture registers, on-chip Analog-to-Digital conver-
sion, and a hardware Master mode I2C interface. The famil-
iar Z8 core in combination with these advanced features
makes the Z9023X family an ideal choice for low to mid-
range televisions in both PAL and NTSC markets.
The Z9023X family consists of three basic device types; ICE
Chip (Z90239), ROM Mask Parts (Z90233/Z90234), and
OTP Part (Z90231). The OTP (Z90231) supports field pro-
grammable 32KB system ROM. ICE Chip (Z90239) is used
in Z90239 Emulator and ProtoPak. As described above,
Z90233 supports 16KB system ROM and Z90234 supports
24KB system ROM for mask.
The Z9021X family takes full advantage of the Z8’s ex-
panded register file space to offer greater flexibility in On
Screen Display creation.
Note: All signals with an overline, “ ”, are active Low. For ex-
ample, B/: (WORD is active Low, only); %/W (BYTE
is active Low, only).
CP00300-TVX0698
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