
72/84
ST63E85, T85 ST63E87, T87
1 GENERAL DESCRIPTION
1.1 INTRODUCTION
The ST63E8x microcontrollers are members of the
8-bit HCMOS ST638x family, a series of devices
specially oriented to TV applications. Different
ROM size and peripheral configurations are avail-
able to give the maximum application and cost
flexibility. They are the EPROM/OTP versions of
the ST636x, 7x, 8x, ROM devices and are suitable
for product prototyping and low volume produc-
tion. All ST638x members are based on a building
block approach: a common core is surrounded by
a combination of on-chip peripherals (macrocells)
available from a standard library. These peripher-
als are designed with the same Core technology
providing full compatibility and short design time.
Many of these macrocells are specially dedicated
to TV applications. The macrocells of the ST638x
family are: two Timer peripherals each including
an 8-bit counter with a 7-bit software programma-
ble prescaler (Timer), a digital hardware activated
watchdog function (DHWD), a 14-bit voltage syn-
thesis tuning peripheral, a Serial Peripheral Inter-
face (SPI), up to six 6-bit PWM D/A converters, an
AFC A/D converter with 0.5V resolution, an on-
screen display (OSD) with 15 characters per line
and 128 characters (in two banks each of 64 char-
acters). In addition the following memory resourc-
es are available: program EPROM (up to 20K),
data RAM (256 bytes), EEPROM (384 bytes). Re-
fer to pin configurations figures and to ST638x de-
vice summary (Table 1) for the definition of
ST638x family members and a summary of differ-
ences among the different types.
Table 1. Device Summary
Device
EPROM
(Bytes)
OTP
(Bytes)
RAM
(Bytes)
EEPROM
(Bytes)
AFC
VS
D/A
Colour
Pins
Target R0M
Devices
ST63E85
20K
256
384
Yes
4
3
ST6365, 75, 85
ST63T85
20K
256
384
Yes
4
3
ST6365, 75, 85
ST63E87
20K
256
384
Yes
6
3
ST6367, 77 87
ST63T87
20K
256
384
Yes
6
3
ST6367, 77 87