st9293 functional description a this is preliminary data from sgs-thomson. details are subject to c hange wi thout notice. may 1993 48k rom hcmos mcus with on screen display and a/d converter register oriented 8/16 bit core with run, wfi and halt modes minimum instruction cycle time: 500ns (12mhz internal) 16 to 48k bytes of rom, 256 to 768 bytes of ram, 224 general purpose registers available as ram, accumulators or index registers (register file) 42-lead shrink dip package interrupt handler and serial peripheral interface as standard features 31 fully programmable i/o pins 34 character x15 rows software programmable on screen display module with colour, italic, un- derline, flash, transparent and fringe attribute options 16 bit timer with 8 bit prescaler, able to be used as a watchdog timer 16-bit programmable slice timer with 8-bit pres- caler 4 channel analog to digital converter, with inte- gral sample and hold, fast 5.75 m s conversion time, 6-bit guaranteed resolution rich instruction set and 14 addressing modes division-by-zero trap generation versatile development tools, including assembler, linker, c-compiler, archiver, graphic oriented de- bugger and hardware emulators real time operating system windowed eprom parts available for prototyp- ing and pre-production development phases device rom ram package st9293j7 48k 768 psdip42 ST9293J5 32k 640 psdip42 st9293j3 24k 512 psdip42 st9293j1 16k 256 psdip42 device summary psdip42 (ordering information at the end of the datasheet) 1/4
figure 1-1. st9293 block diagram cpu 16-bit timer / watchdog + spi slice timer 256 bytes register file i/o port 0 8 256 to 768 ram 16 to 48k x 8 rom i/o port 3 5 on screen display pll hsync pllr pllf vsync 3 i/o port 4 ( analog inputs ) a/d converter i/o port 2 ( spi ) 8 i/o port 5 ( control bus ) ( colour ) 7 memory bus ( address & data ) register bus ( address & data ) vr0b1749 av dd rom ram j7 48k 768 j5 32k 640 j3 24k 512 j1 16k 256 1.1general description the st9293 is a rom member of the st9 family of microcontrollers, completely developed and pro- duced by sgs-thomson microelectronics using a proprietary n-well hcmos process. the rom parts are fully compatible with their eprom versions, which may be used for the pro- totyping and pre-production phases of develop- ment, and can be configured as standalone microcontrollers with 48k/32k/24k/16 bytes of on- chip rom. the nucleus of the st9293 is the advanced core which includes the central processing unit (cpu), the register file, a 16-bit timer/watchdog with 8- bit prescaler, a serial peripheral interface support- ing s-bus, i 2 c-bus and im-bus interface, plus two 8-bit i/o ports. the core has independent memory and register buses allowing a high degree of pipe- lining to add to the efficiency of the code execution speed of the extensive instruction set.the powerful i/o capabilities demanded by microcontroller appli- cations are fulfilled by the st9293 with up to 31/41 i/o lines dedicated to digital input/output. these lines are grouped into up to six i/o ports and can be configured on a bit basis under software control to provide timing, status signals, timer in- puts and outputs, analog inputs, external interrupts and serial or parallel i/o. three basic memory spaces are available to sup- port this wide range of configurations: program memory, data memory and the register file, which includes the control and status registers of the on-chip peripherals. the 16-bit slice timer with an 8-bit prescaler and 6 operating modes allows simple use for wavefor- mgeneration and measurement, pwm functions and many other system timing functions. the human interface is provided by the on screen display module, this can produce up to 8 lines of of up to 34 characters from a rom defined 128 char- acter set. the 9x13 character can be modified by 4 different pixel sizes, with character rounding, and formed into words with colour and format attrib- utes. in addition there is a 4 channel analog to digital converter with integral sample and hold, fast 5.5 m s conversion time and 6-bit guaranteed resolution. a st9293 2/4
i/o port name function alternate function pin assignment port.bit 9293j p0.0 i/o 12 p0.1 i/o 11 p0.2 i/o 10 p0.3 i/o 9 p0.4 i/o 8 p0.5 i/o 7 p0.6 i/o 6 p0.7 i/o 5 p2.0 int6 i external interrupt 6 39 p2.1 int7 i external interrupt 7 40 p2.2 int0 i external interrupt 0 41 table 1-1. st9293 i/o port alternate function summary 1.2 pin description vsync . vertical synch. vertical video synchroni- sation input to osd. positive or negative polarity. hsync . horizontal synch. horizontal video syn- chronisation input to osd. positive or negative po- larity. pllf . pll filter input. filter input for the osd for pll feed-back. pllr . pll resistor connection pin. for resistor connection to select the pll gain adjust. reset . reset (input, active low). the st9 is ini- tialised by the reset signal. with the deactivation of reset, program execution begins from the pro- gram memory location pointed to by the vector contained in program memory locations 00h and 01h. oscin, oscout . oscillator (input and output). these pins connect a parallel-resonant crystal (24mhz maximum), or an external source to the on-chip clock oscillator and buffer. oscin is the in- put of the oscillator inverter and internal clock gen- erator; oscout is the output of the oscillator inverter. av dd . analog v dd of pll. this pin must be tied to v dd externally to the st9293. v dd . main power supply voltage (5v 10%) v ss , v ss2 . digital circuit ground, these pins must be connected together externally to the st9293. p0.0-p0.7, p2.0-p2.7, p3.3-p3.7, p4.5-p4.7, p5.0-p5.6 i/o port lines (input/output, ttl or cmos compatible). 31 lines grouped into i/o ports, bit programmable under program control as general purpose i/o or as alternate functions (see next section). p3.3 and p3.4 are true 12v open drain outputs when set in output mode. 1.2.1 i/o port alternate functions. each pin of the i/o ports of the st9293 may as- sume software programmable alternative func- tions as shown in the pin configuration drawings. table 1 shows the functions allocated to each i/o port pin. a st9293 3/4
pin description (continued) i/o port name function alternate function pin assignment port.bit 9293j p2.3 int3 i external interrupt 3 42 p2.4 wdout o t/wd output 1 p2.4 extrg i external a/d trigger 1 p2.5 sdo o mspi serial data output 2 p2.6 int2 i external interrupt 2 3 p2.6 sck o spi serial clock 3 p2.7 sdo o spi serial data output 4 p2.7 sdi i spi serial data input 4 p3.3 o (12v open drain output) 34 p3.3 slout o slice timer output 34 p3.4 o (12v open drain output) 35 p3.4 slin i slice timer input 35 p3.5 int4 i schmitt triggered input only 36 p3.6 wdin i t/wd input 37 p3.6 ain4 i a/d analog input 4 37 p3.7 nmi i non-maskable interrupt 38 p4.5 ain5 i a/d analog input 5 27 p4.6 ain6 i a/d analog input 6 28 p4.7 ain7 i a/d analog input 7 29 p5.0 i/o 14 p5.1 i/o 15 p5.2 i/o 16 p5.3 fb o fast blanking osd output 17 p5.4 b o blue video colour osd output 18 p5.5 g o green video colour osd output 19 p5.6 r o red video colour osd output 20 table 1-2. st9293 i/o port alternate function summary information furnished is believed to be accurate and reliable. however, sgs-thomson microelectronics assumes no responsability for the consequences of use of such information nor for any infringement of patents or other rights of t hird part ies which may result from its use. no license is granted by impl ication or otherwise under any patent or patent rights of sgs-thomson microelec tronics. specifications mentioned in this publication are subject to change without not ice. this publication supersedes and replaces all information previously supplied. sgs-thomson microelectronics products are not authori zed for use as critical comp onents in life support devices or syst ems without the express written approval of sgs-thomson microelec tronics. ? 1995 sgs-thomson microelectronics - all rights reserved. purchase of i 2 c components by sgs-thomson microelectronics conveys a license under the philips i 2 c patent. rights to use these components in an i 2 c system is granted provided that the system conforms to the i 2 c standard specification as defined by philips. sgs-thomson microelectronics group of companies australia - brazil - france - germany - hong kong - italy - japan - korea - malaysia - malta - morocco the netherlands - singapore - spain - sweden - switzerland - taiwan - thailand - united kingdom - u.s.a. a st9293 4/4
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