8
ST 6385
8 BIT HCMOS MCUs FOR
TV VOLTAGE SYNTHESIS WITH OSD
GENERAL DESCIRIPTION
The ST6385,86,87,88 microcontrollers are member of the 8-bit HCMOS ST638X family, a series of devices
specially oriented to TV applications. Different pin-out and peripheral configýration are avaiable to give the maximum
aplication and cost flexibility. All ST638X members are based on a building block appoach: a common coreis
surrounded by a combination of on-chip peripherals (macrocells) avaiable from a standard library. These peribherals
are designed with the same Core technology providing full compatibility and short desing 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 programmable precaler (Timer), a digital hardware activated watchdog
function (DHWD), a 14-bit voltage synthesis tuning pripheral, a serial peripheral interface (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,
128 characters (in two banks each of 64 chracaters). In addition the following memory resources are available:
program ROM (20K), data RAM (256 bytes),
EEPROM (384 bytes). Refer to pin configurations figures and to ST638X device summary (Table 1)
for the definition of ST638X family members and a summary of differences among the different types.
FEATURES
n 8-bit Architecture
n HCMOS Technology
n 8Mhz Clock
n User Program ROM: 20140 bytes
n Reserved Test ROM: 336 bytes
n Data ROM: User selectable size
n Data RAM: 256 bytes
n Data EEPROM: 384 bytes
n 42-Pin Shrink Dual in Line Plastic Package
n Up to 22 software programmable general purpose Inputs/Outputs,including 2 direct LED driving nOutputs
n Two Timers each including an 8-bit counter with a 7-bit programable prescaler
n Digital Watchdog Fuction
n Serial Peripheral Interface (SP) supporting S-BUS/ I
2
C BUS and standart serial protocols
n Up to Six 6-Bit PWM D/A Converters
n 62.5KHz Output Pin (ST6386,88 Only)
n AFC A/D converter with 0.5V resolution
n Five interrupt vectors (IRIN/NMI, Timer 1 & 2, VSYNC, PWR INT.)
n 14 bit counter for voltage synthesis tuning
n On-chip clock oscillator
n 5 Lines by 15 Characters On-Screen Diplay Generator with 128 Characters
n Byte efficient instruction set
n Bit test and jump instructions
n Wait and Bit Manipulation insructions
n True LIFO 6-level stack
n All ROM types are supported by pin-to-pin piggy-back versions.
n The develeopment tool of the ST638X microcon-trollers consists of the ST638X-EMU emulation and
development system to be connected via a standard RS232 serial line to an MS-DOS Personal Computer.
PINNING
1- DA0 Output, Open-Drain, 12V
2- DA1 Output, Open-Drain, 12V
3- DA2 Output, Open-Drain, 12V
4- DA3 Output, Open-Drain, 12V
5- DA4 Output, Open-Drain, 12V
6- DA5 Output, Open-Drain, 12V
7- 62.5KHz OUT Output, Open-Drain, 12V
8- AFC Input, High Impedance, 12V
9- VS Output, Push-Pull
10- R,G,B, BLANK Output, Push-Pull
11- HSYNC, VSYNC Input, Pull-up, Schmitt Trigger
12- OSDOSCIN Input , High Impedance
13- OSDOSCOUT Output, Push-Pull
14- TEST Input Pull-Down
15- OSCIN Input, Resistive Bias, Schmitt Trigger to Reset Logic Only
16- OSCOUT Output, Push-Pull
17- RESET Input, Pull-up, Schmitt Trigger Input
18- PA0 I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
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