"" , STC 89 1280 IAP 8/16/32/64k SRAM ISP P0 8051 8 E2PROM Data Flash IAP STC P2 + P4.0--P4.3 MAX810 I/O " " UART A/D 3 STC 89C51 RC P I I 4 S A EMI P P 4K E2P ROM 512 2K 2K STC 89C52 RC 8K 512 STC 89C53 RC 15K 512 STC 89C54 RD+ 16K 1280 16K STC 89C55 RD+ 20K 1280 16K STC 89C58 RD+ 32K 1280 16K STC 89C516 RD+ 64K 1280 4K 512 2K 2K STC 89LE52 RC 8K 512 STC 89LE53 RC 15K 512 16K 1280 16K 16K STC 89LE58 RD+ 32K 1280 STC 89LE516RD+ 64K 1280 64K 512 STC 89LE516AD " "" " V+ 16 GND 15 3 C1- T1OUT 14 4 C2+ R1IN 13 5 C2- R1OUT 12 6 V- T1IN 11 T2IN 10 R2OUT 9 7 T2OUT 8 R2IN Vcc 0.1uF 0.1uF 2 Vcc Gnd PC_RxD (COM Pin2) PC_TxD (COM Pin3) MCU_RxD (P3.0) MCU_TxD (P3.1) P3.0 VCC P3.1 XTAL2 89C52RC 89C58RD+ 89LE52RC XTAL1 89LE516RD+ GND RESET Vcc Vcc 0.1uF C1+ 10uF 1 STC STC3232,STC232,MAX232,SP232 P4 STC 89LE51 RC STC 89LE54 RD+ P3 A / D STC 89 P1 ---- , x , 20-lead, 0.300" Wide, Plastic Dual Inline , 20-lead, 0.300" Wide, Plastic Gull WIng Small Package (PDIP-20) Outline (SOIC-20 / SOP-20) Dimensions in Inches and (Millimeters) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-001 AD x -- Vcc 0.1uF C1+ Vcc 16 Vcc 2 V+ GND 15 Gnd 3 C1- T1OUT 14 4 C2+ 5 C2- 6 V- T1IN 11 7 T2OUT T2IN 10 R1IN 13 PC_RxD (COM Pin2) "" PC_TxD (COM Pin3) 0.1uF 0.1uF 8 R2IN R1OUT 12 R2OUT 9 1 Vcc " " Vcc 0.1uF C1+ Vcc 16 Vcc 2 V+ GND 15 Gnd 3 C1- T1OUT 14 4 C2+ 5 C2- 6 V- T1IN 11 7 T2OUT T2IN 10 R1IN 13 PC_RxD (COM Pin2) "" PC_TxD (COM Pin3) 0.1uF 0.1uF R1OUT 12 8 R2IN R2OUT 9 1 Vcc " " 12/ 1/ 12 6 6 6 6 6 6 4 8 6 6 8 4 8 4 8 6 6 8 8 8 8 6 8 4 3 3 3 12/ 1/ 6 4 4 6 6 4 4 6 6 4 4 6 6 4 3 3 6 4 3 3 24 12 9.6 3 "" "" " " "" "" "" "" "" " " "" "" "" "" "" " " "" "" "" " " 12 / 1 / 6 4 4 6 3 6 6 4 4 6 3 6 6 4 4 6 3 6 12 6 12 12 12 12 12 L L 12/ 1/ 4 4 6 6 8 6 8 8 8 8 4.8 6 6 4.8 6 4.8 12 0 0 1 1 "" "" "" "" 12/ 1/ 12 3 12 3 12 3 8 8 8 8 4 8 8 8 6 6 4.8 "" " " I/ O ( 8 0 5 1 I/ O , 2 0 m A , 2 3 0 A , 2 5 0 uA 1 6 0 uA 20mA (Open Drain) I/ O ( 8 0 5 1 I/ O , 2 0 mA , 2 3 0 A , 2 5 0 uA 1 6 0 uA 20mA ( O p e n Drain) I/O P1.x A/D 8051 I/O , 20mA , 230A , 250uA160uA 20mA I/OA/D (Open Drain) I/OA/D I/ O ( 8 0 5 1 I/ O , 2 0 m A , 2 3 0 A , 2 5 0 uA 1 6 0 uA 20mA (Open Drain) "" "" "" "" "" """""" """""" "" "" = (12 x Pre-scale x 32768) / 11059200 = Pre-scale x 393216 / 11059200 ... ... ... ... ... ... } } " " " "" " " " " " " " " " " " " " " " / " " " " " " "" "" "" """" """" / / / / x * ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... ... I/O P1.x A/D 8051 I/O , 20mA , 230A 20mA I/O A/D (Open Drain) I/O A/D "1" / ) = 1024 x Vin / Vcc Vi n V cc = 256 x Vin / Vcc CMOD CCON - - 0 0 0 0 Write to CCAPnL Write to CCAPnH 0 - 1 - 0 0 1 0 0 0 1 - - 0 0 1 1 0 - 1 0 0 0 0 1 0 "" Vcc 0.1uF C1+ Vcc 16 Vcc 2 V+ GND 15 Gnd 3 C1- T1OUT 14 4 C2+ 5 C2- 6 V- T1IN 11 7 T2OUT T2IN 10 R1IN 13 PC_RxD (COM Pin2) "" PC_TxD (COM Pin3) 0.1uF 0.1uF R1OUT 12 8 R2IN R2OUT 9 1 Vcc " """ " " " " " " " " " " " " " " " "" " "" " " " " "" "" "" ---- SPI SPCTL - 8 5 h SPI SPSTAT - 8 4h SPI SPSTAT - 8 4h "" "" SPI SPDAT - 8 6 h SPI -- " " ...... , 20-lead, 0.300" Wide, Plastic Dual Inline , 20-lead, 0.300" Wide, Plastic Gull WIng Small Package (PDIP-20) Outline (SOIC-20 / SOP-20) Dimensions in Inches and (Millimeters) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-001 AD x STC6344 89C51RC 89C54RD+ 89C58RD+ 89LE516AD 1 GND VCC 3 Vcc 2 RESET RESET VCC VCC RESET STC810 100K <1.25V GND MR PFI PFO RESET Interrupt PFO=0 STC813L STC6345 10K <1.25V VCC STC89C51RC STC89C52RC STC89C53RC STC89C54RD+ STC89C58RD+ STC89C516RD+ RESET VCC VCC RESET RESET GND RESET PFI Interrupt 100K PFO MR WDO VCC RESET GND WDI I/O PFI PFO Interrupt <1.25V PFO=0 PFO=0 RESET uC / DSP STC6342 STC809 1 uC / DSP VCC RESET GND 10K <1.25V RESET STC706S PFI PFO <1.25V PFO=0 uC / DSP Interrupt VCC uC / DSP MR RESET VCC RESET GND NC PFI PFO WDO RESET RESET GND WDI I/O PFI PFO Interrupt VCC STC708 100K 100K PFO=0 VCC MR VCC 3 2 MR RESET GND Vcc RESET VCC <1.25V PFO=0 RESET Interrupt RESET uC / DSP '