P R E L I M I N A R Y
Z86E47-ROM
CPS DC-4157-01
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RELIMINARY
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USTOMER
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RODUCT
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PECIFICATION
Z86E47 OTP ROM
CMOS Z8
廬
8-B
IT
M
ICROCONTROLLER
GENERAL DESCRIPTION
The Z86E47 Digital Television Controller (DTC) introduce
a new level of sophistication to single-chip architecture.
The Z86E47 is a member of the Z8 single-chip
microcontroller family with 16 Kbytes of OTP (One-Time-
Programmable) ROM and 236 bytes of RAM. The device
is housed in a 64-pin DIP package, and is CMOS compat-
ible. The part features ROMs for program storage and
character generation. The Z86E47 microcontroller may be
used in prototyping, low volume applications or where
code development is required. Zilog鈥檚 DTC offers fast
execution, efficient use of memory, sophisticated inter-
rupts, input/output bit manipulation capabilities, and easy
hardware/software system expansion along with low cost
and low power consumption. The device provides an ideal
performance and reliability solution for consumer and
industrial television applications.
The Z86E47 architecture utilizes Zilog鈥檚 advanced
Superintegration鈩?design methodology. The device has
an 8-bit internal data path controlled by a Z8 microcontroller,
On-Screen Display (OSD) logic circuits/Pulse Width Modu-
lators (PWM). On-chip peripherals include five register/
memory mapped I/O ports (Ports 2, 3, 4, 5, and 6), Interrupt
control logic (1 software, 2 external and 3 internal inter-
rupts) and a standby mode recovery input port (Port 3, pin
P30).
The OSD control circuits support eight rows by 20 columns
for 128 kinds of characters. The character color is speci-
fied by row. One of the eight rows is assigned to show two
kinds of colors for bar type displays such as volume
control. The OSD is capable of displaying high resolution
(11x15 dot pattern) characters.
A 14-bit PWM port provides enough voltage resolution for
a voltage synthesizer tuning system. Seven 6-bit PWM
ports are used for controlling audio signal level. Five 8-bit
PWM ports are used to vary picture levels.
DTC applications demand powerful I/O capabilities. The
Z86E47 fulfills this with 35 I/O pins dedicated to input and
output. These lines are grouped into five ports, and are
configurable under software control to provide timing,
status signals, parallel I/O and an address/data bus for
interfacing to external memory.
There are three basic address spaces available to support
this wide range of configurations: Program Memory, Reg-
ister File and Data Memory. The Data Memory address
space contains a number of control registers for the
PWMs, OSD, and I/O Ports 4, 5, and 6. Specifically, there
are 13 PWM and eight OSD control registers mapped into
the external memory address space. Three I/O registers
for Ports 4, 5, and 6 reside in data memory space as well.
The Register File is composed of 236 bytes of general
purpose register, two I/O Port registers and 15 control and
status registers.
To unburden the program from coping with the real-time
problems such as counting/timing and data communica-
tion, the DTC鈥檚 offer two on-chip counter/timers with a large
number of user selectable modes (see block diagram).
Note:
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).
DC-4157-01
(2-18-94)
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