" " , , 20-lead, 0.300" Wide, Plastic Dual Inline Package (PDIP-20) Dimensions in Inches and (Millimeters) , 20-lead, 0.300" Wide, Plastic Gull WIng Small Outline (SOIC-20) Dimensions in Inches and (Millimeters) JEDEC STANDARD MS-001 AD 0.1uF 1 C1+ Vcc 16 V+ GND 15 C1- T1OUT 14 4 C2+ R1IN 13 5 C2- R1OUT 12 6 V- T1IN 11 7 T2OUT T2IN 10 8 R2IN R2OUT 9 Gnd PC_RxD (COM Pin2) "" PC_TxD (COM Pin3) 2 3 Vcc " " 12 / 1 / 12/ 1/ "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" "" 12/ 1/ L L 12/ 1/ "" "" "" "" 12/ 1/ " " " " I/O ( 8051 I/O 20mA (Open Drain) I/O P1.x A/D 8051 I/O 20mA I/OA/D (Open Drain) I/OA/D "" "" " " "" I/O P1.x A/D 8051 I/O 20mA I/O A/D (Open Drain) I/O A/D "1" / = 256 x Vin / Vcc Vin Vcc " " " " " "" " " " " " "" """" = (12 x Pre-scale x 32768) / 11059200 = Pre-scale x 393216 / 11059200 ... ... ... ... ... ... } } "" " " " "" " " """" " " " " " " " " " / " " " " " " "" "" "" """" """" / / / / CMOD CCON - - 0 0 0 0 Write to CCAPnL Write to CCAPnH 0 - 1 - 0 0 1 0 0 1 0 - - 0 0 1 1 0 - 1 0 0 0 0 1 0 0.1uF 1 C1+ Vcc 16 V+ GND 15 C1- T1OUT 14 4 C2+ R1IN 13 5 C2- R1OUT 12 6 V- 7 T2OUT Gnd PC_RxD (COM Pin2) "" PC_TxD (COM Pin3) 2 3 Vcc T1IN 11 8 R2IN T2IN 10 R2OUT 9 " " " " " " " " " " " " " " " "" " "" " " " " "" "" "" ---- SPI SPCTL - 85h SPI SPSTAT - 84h SPI SPSTAT - 84h "" "" SPI SPDAT - 86h SPI -- " " STC 89 1280 IAP 8/16/32/64k SRAM ISP P0 8051 8 2 E PROM IAP Data Flash STC + P4.0--P4.3 MAX810 I/O " " UART A/D 3 P1 P2 P3 P4 A / D STC 89 P I I 4 S A EMI P P E2P ROM STC 89C51 RC 4K 512 2K STC 89C52 RC 8K 512 2K 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 STC 89LE54 RD+ 16K 1280 16K STC 89LE58 RD+ 32K 1280 16K STC 89LE516RD+ 64K 1280 " "" " STC 16 Vcc Gnd 2 V+ GND 15 3 C1- T1OUT 14 4 C2+ R1IN 13 5 C2- R1OUT 12 6 V- T1IN 11 7 T2OUT T2IN 10 8 R2IN R2OUT 9 PC_RxD (COM Pin2) Vcc 0.1uF 0.1uF 10uF C1+ SP3232, SP232 1 STC ---- STC STC 89LE51 RC 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 STC810 1 GND VCC 3 2 RESET ,