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
n8-bit Architecture
nHCMOS Technology
n8Mhz Clock
nUser Program ROM: 20140 bytes
nReserved Test ROM: 336 bytes
nData ROM: User selectable size
nData RAM: 256 bytes
nData EEPROM: 384 bytes
n42-Pin Shrink Dual in Line Plastic Package
nUp to 22 software programmable general purpose Inputs/Outputs,including 2 direct LED driving nOutputs
nTwo Timers each including an 8-bit counter with a 7-bit programable prescaler
nDigital Watchdog Fuction
2
nSerial Peripheral Interface (SP) supporting S-BUS/ IC BUS and standart serial protocols
nUp to Six 6-Bit PWM D/A Converters
n62.5KHz Output Pin (ST6386,88 Only)
nAFC A/D converter with 0.5V resolution
nFive interrupt vectors (IRIN/NMI, Timer 1 & 2, VSYNC, PWR INT.)
n14 bit counter for voltage synthesis tuning
nOn-chip clock oscillator
n5 Lines by 15 Characters On-Screen Diplay Generator with 128 Characters
nByte efficient instruction set
nBit test and jump instructions
nWait and Bit Manipulation insructions
nTrue LIFO 6-level stack
nAll ROM types are supported by pin-to-pin piggy-back versions.
nThe 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- DA0Output, Open-Drain, 12V
2- DA1Output, Open-Drain, 12V
3- DA2Output, Open-Drain, 12V
4- DA3Output, Open-Drain, 12V
5- DA4Output, Open-Drain, 12V
6- DA5Output, Open-Drain, 12V
7- 62.5KHz OUTOutput, Open-Drain, 12V
8- AFCInput, High Impedance, 12V
9- VSOutput, Push-Pull
10- R,G,B, BLANKOutput, Push-Pull
11- HSYNC, VSYNCInput, Pull-up, Schmitt Trigger
12- OSDOSCINInput , High Impedance
13- OSDOSCOUTOutput, Push-Pull
14- TESTInput Pull-Down
15- OSCINInput, Resistive Bias, Schmitt Trigger to Reset Logic Only
16- OSCOUTOutput, Push-Pull
17- RESETInput, Pull-up, Schmitt Trigger Input
18- PA0I/O, Push-Pull, Software Input Pull-up, Schmitt Trigger Input
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