MDT2020(DF) 1. General Description This EPROM-Based 8-bit micro-controller uses a fully static CMOS design technology combines higher speed and smaller size with the low power and high noise immunity of CMOS. On chip memory system includes 2.0 K bytes of ROM, and 80 bytes of static RAM. 2. Features The followings are some of the features on the hardware and software : u Fully CMOS static design u 8-bit data bus u On chip ROM size : 2 K words u Internal RAM size : 80 bytes (72 general purpose, 8 special registers) u 36 single word instructions u 14-bit instructions u 2-level stacks u Operating voltage : 2.3 V ~ 5.5 V u Operating frequency : 0 ~ 20 MHz u The most fast execution time is 200 ns under 20 MHz in all single cycle instructions except the branch instruction. u Addressing modes include direct, indirect and relative addressing modes u Power-on Reset u Power Edge-detector Reset u Sleep mode for power saving u 4 oscillator start-up time : 150 µs, 20 ms, 40 ms, 80 ms u 8-bit real time clock/counter(RTCC) with 8-bit programmable prescaler u 4 types of oscillator can be selected by code options : RC－Low cost RC oscillator LFXT－Low frequency crystal oscillator XTAL－Standard crystal oscillator HFXT－High frequency crystal oscillator u On-chip RC oscillator based Watchdog Timer(WDT) can be operated freely u 20 I/O pins with their own independent direction control 3. Applications The application areas of this MDT2020 range from appliance motor control and high speed automotive to low power remote transmitters/receivers, pointing devices, and telecommunications processors, such as Remote controller, small instruments, chargers, toy, automobile and PC peripheral … etc. This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 1 2005/6 VER 1.3 MDT2020(DF) 4. Pin Assignment DIP/ SOP/ SKINNY RTCC Vdd N/C Vss N/C PA0 PA1 PA2 PA3 PB0 PB1 PB2 PB3 PB4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 SSOP /MCLR OSC1 OSC2 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PB7 PB6 PB5 VSS RTCC VDD VDD PA0 PA1 PA2 PA3 PB0 PB1 PB2 PB3 PB4 VSS 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 /MCLR OSC1 OSC2 PC7 PC6 PC5 PC4 PC3 PC2 PC1 PC0 PB7 PB6 PB5 5. Pin Function Description Pin Name I/O Function Description PA0~PA3 I/O Port A, TTL input level PB0~PB7 I/O Port B, TTL input level PC0~PC7 I/O Port C, TTL input level RTCC I Real Time Clock/Counter, Schmitt Trigger input levels /MCLR I Master Clear, Schmitt Trigger input levels OSC1 I Oscillator Input OSC2 O Oscillator Output Vdd Power supply Vss Ground This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 2 2005/6 VER 1.3 MDT2020(DF) 6. Memory Map (A) Register Map Address Description 00 Indirect Addressing Register 01 RTCC 02 PC 03 STATUS 04 MSR 05 Port A 06 Port B 07 Port C 08~0F Internal RAM, General Purpose Register 10~1F Internal Memory Select Register 30~3F Internal Memory Select Register 50~5F Internal Memory Select Register 70~7F Internal Memory Select Register (1) IAR ( Indirect Address Register) : R0 (2) RTCC (Real Time Counter/Counter Register) : R1 (3) PC (Program Counter) : R2 Write PC, CALL --- always 0 LJUMP, JUMP, LCALL --- from instruction word RTWI, RET --- from STACK A10 A9 A8 A7~A0 Write PC, JUMP, CALL --- from STATUS b6 b5 LJUMP, LCALL --- from instruction word RTWI, RET --- from STACK Write PC --- from ALU LJUMP, JUMP, LCALL, CALL --- from instruction word RTWI, RET --- from STACK This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 2 2005/6 VER 1.3 MDT2020(DF) (4) STATUS (Status register) : R3 Bit Symbol Function 0 C Carry bit 1 HC Half Carry bit 2 Z Zero bit 3 PF Power loss Flag bit 4 TF Time overflow Flag bit page Page select bit : 6—5 00 : 000H --- 1FFH 01 : 200H --- 3FFH 10 : 400H --- 5FFH 11 : 600H --- 7FFH —— 7 General purpose bit (5) MSR (Memory Select Register) : R4 Memory Select Register : 00 : 10~1F 01 : 30~3F 10 : 50~5F 11 : 70~7F b7 b6 b5 b4 b3 b2 b1 Read only “1” Indirect Addressing Mode (6) PORT A : R5 PA3~PA0, I/O Register (7) PORT B : R6 PB7~PB0, I/O Register (8) PORT C : R7 PC7~PC0, I/O Register This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 3 2005/6 VER 1.3 b0 MDT2020(DF) (9) TMR (Time Mode Register) Bit Symbol Function Prescaler Value 2—0 PS2—0 3 PSC 4 TCE 5 TCS RTCC rate WDT rate 0 0 0 1:2 1:1 0 0 1 1:4 1:2 0 1 0 1:8 1:4 0 1 1 1 : 16 1:8 1 0 0 1 : 32 1 : 16 1 0 1 1 : 64 1 : 32 1 1 0 1 : 128 1 : 64 1 1 1 1 : 256 1 : 128 Prescaler assignment bit : 0 — RTCC 1 — Watchdog Timer RTCC signal Edge : 0 — Increment on low-to-high transition on RTCC pin 1 — Increment on high-to-low transition on RTCC pin RTCC signal set : 0 — Internal instruction cycle clock 1 — Transition on RTCC pin (10) CPIO A, CPIO B, CPIO C (Control Port I/O Mode Register) The CPIO register is “write-only” ＝“0”, I/O pin in output mode; ＝“1”, I/O pin in input mode. (11) EPROM Option by Writer Programming: Oscillator Type RC Oscillator Oscillator Start-up Time 150 µs,20ms,40ms,80ms HFXT Oscillator 20 ms,40ms,80ms XTAL Oscillator 20ms,40 ms,80ms LFXT Oscillator 80 ms Watchdog Timer control Watchdog timer disable all the time Watchdog timer enable all the time This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 4 2005/6 VER 1.3 MDT2020(DF) Power Edge Detect PED Security bit Disable Security weak Disable PED Enable Security Disable Security Enable 7. Reset Condition for all Registers Register Address Power-On Reset /MCLR or WDT Reset CPIO A －－ 1111 1111 1111 1111 CPIO B －－ 1111 1111 1111 1111 CPIO C －－ 1111 1111 1111 1111 TMR －－ --11 1111 --11 1111 IAR 00h － － RTCC 01h xxxx xxxx uuuu uuuu PC 02h 1111 1111 1111 1111 STATUS 03h 0001 1xxx 000# #uuu MSR 04h 100x xxxx 100u uuuu PORT A 05h - - - - xxxx - - - - uuuu PORT B 06h xxxx xxxx uuuu uuuu PORT C 07h xxxx xxxx uuuu uuuu Note : u = unchanged, x = unknown, - = unimplemented, read as “0” # = value depends on the condition of the following table Condition Status: bit 4 Status: bit 3 /MCLR reset (not during SLEEP) u u /MCLR reset during SLEEP 1 0 WDT reset (not during SLEEP) 0 1 WDT reset during SLEEP 0 0 This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 5 2005/6 VER 1.3 MDT2020(DF) 8. Instruction Set Instruction Code Mnemonic Operands Function Operating Status 010000 00000000 NOP No operation None 010000 00000001 CLRWT Clear Watchdog timer 0→WT TF, PF 010000 00000010 SLEEP Sleep mode 0→WT,stop OSC TF, PF 010000 00000011 TMODE Load W to TMODE register W→TMODE None 010000 00000100 RET Return Stack→PC None Control I/O port register W→CPIO Store W to register W→R 010000 00000rrr CPIO R 010001 1rrrrrrr STWR 011000 trrrrrrr LDR R， t Load register R→t Z 111010 iiiiiiii LDWI Load immediate to W I→W None 010111 trrrrrrr SWAPR R，t Swap halves register [R(0~3) ↔ R(4~7)]→t None 011001 trrrrrrr INCR 011010 trrrrrrr R I R，t Increment register r None None R + 1→t Z R + 1→t None 011011 trrrrrrr INCRSZ R， Increment register，skip if zero ADDWR R，t Add W and register W + R→t C，HC，Z 011100 trrrrrrr SUBWR R，t Subtract W from register R ﹣W→t (R+/W+1→t) C，HC，Z 011101 trrrrrrr DECR R，t R ﹣1→t Z 011110 trrrrrrr DECRSZ R，t R ﹣1→t None 010010 trrrrrrr Decrement register， skip if zero ANDWR R，t AND W and register R ∩ W→t Z 110100 iiiiiiii ANDWI I I ∩ W→W Z 010011 trrrrrrr IORWR R，t Inclu. OR W and register R ∪ W→t Z 110101 iiiiiiii IORWI I I ∪ W→W Z 010100 trrrrrrr XORWR R，t Exclu. OR W and register R ♁ W→t Z 110110 iiiiiiii XORWI I Exclu. OR W and immediate I ♁ W→W Z 011111 trrrrrrr COMR R， t Complement register /R→t Z 010110 trrrrrrr RRR R，t Rotate right register R(n)→R(n-1)， C→R(7) R(0)→C C 010101 trrrrrrr RLR Rotate left register R(n)→(n+1)， C→R(0) R(7)→C C 010000 1xxxxxxx CLRW Clear working register 0→W Z 010001 0rrrrrrr CLRR Clear register 0→R Z 0000bb brrrrrrr BCR R， b Bit clear 0→R(b) None 0010bb brrrrrrr BSR R， b 1→R(b) None Decrement register AND W and immediate Inclu. OR W and immediate R， t R Bit set This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 6 2005/6 VER 1.3 MDT2020(DF) Instruction Code Mnemonic Operands Function Operating Status 0001bb brrrrrrr BTSC R， b Bit Test，skip if clear Skip if R(b)=0 None 0011bb brrrrrrr BTSS R， b Bit Test，skip if set Skip if R(b)=1 None 100nnn nnnnnnnn LCALL n Long CALL subroutine n→PC， PC+1→Stack None 101nnn nnnnnnnn LJUMP n Long JUMP to address n→PC None 110000 nnnnnnnn CALL n Call subroutine n→PC, PC+1→Stack None 110001 iiiiiiii RTWI i 11001n nnnnnnnn JUMP n Return, place immediate to Stack→PC, W i→W None JUMP to address None n→PC Note : W WT TMODE CPIO TF PF PC OSC Inclu. Exclu. AND : : : : : : : : : : : Working register Watchdog timer TMODE mode register Control I/O port register Timer overflow flag Power loss flag Program Counter Oscillator Inclusive ‘∪’ Exclusive ‘♁’ Logic AND ‘∩’ b t : : 0 1 R : C : HC : Z : / : x : i : n : Bit position Target : Working register : General register General register address Carry flag Half carry Zero flag Complement Don’t care Immediate data ( 8 bits ) Immediate address 9. Electrical Characteristics (A) Operating Voltage & Frequency Vdd ﹕2.3 V ~ 5.5 V Frequency﹕0 Hz ~ 20 MHz (B) Input Voltage @ V dd＝5.0 V, Temperature＝25 ℃ Vil Vih Port Min. Max. PA, PB, PC Vss 1.0 V RTCC, /MCLR Vss 1.0 V PA, PB, PC 2.0 V Vdd RTCC, /MCLR 3.3 V Vdd This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 7 2005/6 VER 1.3 MDT2020(DF) ＊Threshold Voltage : Port A, Port B, Port C V th＝1.5 V RTCC, /MCLR V il ＝1.3 V, V ih ＝3.0 V (Schmitt Trigger) (C) Output Voltage @ V dd＝5.0 V, Temperature＝25 ℃, the typical value as followings : PA, PB, PC Port Ioh＝－20.0 mA Voh＝3.8 V Iol ＝20.0 mA Vol ＝0.5 V Ioh＝－5.0 mA Voh＝4.6 V Iol ＝5.0 mA Vol ＝0.13 V (D) Leakage Current @ V dd＝5.0 V, Temperature＝25 ℃, the typical value as followings : Iil － 0.1µA (Max.) Iih ＋ 0.1 µA (Max.) (E) Sleep Current @WDT－Disable, Temperature＝25 ℃, the typical value as followings : Vdd＝2.3 V Idd＜0.1 µA Vdd＝3.0 V Idd＜0.1 µA Vdd＝4.0 V Idd＜0.1 µA Vdd＝5.0 V Idd＜0.1 µA Vdd＝5.5 V Idd=0.3 µA @WDT－Enable, Temperature＝25 ℃, the typical value as followings : Vdd＝2.3 V Idd＜1.0 µA Vdd＝3.0 V Idd＝4.0 µA Vdd＝4.0 V Idd＝10.0 µA Vdd＝5.0 V Idd＝19.0 µA Vdd＝5.5 V Idd＝35.0 µA This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 8 2005/6 VER 1.3 MDT2020(DF) F) Operating Current Temperature＝25℃, the typical value as followings : (i) OSC Type＝RC ; WDT－Enable; @ V dd＝5.0 V Cext. (F) 3P 20P 100P 300P Rext. (Ohm) Frequency (Hz) Current (A) 4.7 K 11.8 M 1.5 mA 10.0 K 5.9 M 835 µA 47.0 K 1.3 M 280 µA 100.0 K 685 K 190 µA 300.0 K 225 K 140 µA 470.0 K 140 K 132 µA 4.7 K 6.1 M 865 µA 10.0 K 3.1 M 513 µA 47.0 K 760 K 195 µA 100.0 K 355 K 155 µA 300.0 K 120 K 125 µA 470.0 K 75 K 120 µA 4.7 K 1.9 M 355 µA 10.0 K 1.0 k 225 µA 47.0 K 220 K 130 µ A 100.0 K 100 K 116 µA 300.0 K 35 K 110 µA 470.0 K 22 K 108 µA 4.7 K 950 K 210 µA 10.0 K 520 K 155 µA 47.0 K 95 K 115 µA 100.0 K 45 K 106 µA 300.0 K 15.0 K 102 µA 470.0 K 9.6 K 100 µA This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 9 2005/6 VER 1.3 MDT2020(DF) (ii) OSC Type＝LF (C=20 p); WDT－Disable Voltage/Frequency 32 K 455 K 1M Sleep 2.8 µA 3.0 V 5.0 µA 36.0 µA 60.0 µA ＜0.1 µA 4.0 V 11.0µA 63.0 µA 100.0 µA ＜0.1 µA 5.0 V 28.0 µA 100.0 µA 150.0 µA ＜0.1 µA 5.5 V 52.0 µA 130.0 µA 179.0 µA 0.3 µA 10 M Sleep X @2.6V 65 µA ＜0.1 µA 2.3 V (iii) OSC Type＝XT (C=20 p); WDT－Enable Voltage/Frequency 1M 4M 2.1 V 60.0 µA 150.0 µA 350.0 µA ＜1.0 µA 3.0 V 120.0 µA 280.0 µA 590.0 µA 4.0 µA 4.0 V 260.0 µA 500.0 µA 950.0 µA 10.0 µA 5.0 V 450.0 µA 740.0 µA 1.50 mA 19.0 µA 5.5 V 524.0 µA 890.0 µA 2.00 mA 35.0 µA (iv) OSC Type＝HF (C=10 p); WDT－Enable Voltage/Frequency 4M 10 M 20 M Sleep 2.1 V 150.0 µA 350.0 µA 630.0 µA 3.0 V 330.0 µA 940.0 µA 1.10 mA 4.0 µA 4.0 V 575.0 µA 1.10 mA 1.70 mA 10.0 µA 5.0 V 900.0 µA 1.60 mA 2.60 mA 19.0 µA 5.5 V 1.00 mA 1.80 mA 2.85 mA 35.0 µA ＜1.0 µA This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 10 2005/6 VER 1.3 MDT2020(DF) (G) Power Edge-detector Reset Voltage (Not in Sleep Mode), @ V dd＝5.0 V Vpr≦1.1~1.3 V Vpr ﹕Vdd (Power Supply) (H) The basic WDT time-out cycle time @Temperature＝25 ℃, the typical value as followings : Vdd =5.0 V, Temperature=25℃,the typical value as followings: Voltage (V) Basic WDT time-out cycle time (ms) 2.3 28.0 3.0 25.0 4.0 21.5 5.0 19.5 5.5 18.5 This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 11 2005/6 VER 1.3 MDT2020(DF) 10. Port A ,Port B and Port C Equivalent Circuit Working Register D Data I/P QB I/O Control Latch I/O Control CK Q Port I/O Pin D Data O/P Latch Write CK Q Data Bus D QB Read Data I/P Latch Input Resistor TTL Input Level CK This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 12 2005/6 VER 1.3 MDT2020(DF) 11. MCLRB and RTCC Input Equivalent Circuit R≒ 1K MCLRB Schmitt Trigger R≒ 1K RTCC Schmitt Trigger This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 13 2005/6 VER 1.3 MDT2020(DF) 12. Block Diagram Stack Two Levels RAM 72*8 EPROM 2048×14 Port PA0~PA3 4 bits Port A 11 bits 11 bits Program Counters 14 bits Instruction Register Special Register OSC1 OSC2 MCLR Oscillator Circuit D0~D7 Instruction Decoder Port B Port PB0~PB7 8 bits Control Circuit Data 8-bit Power on Reset Power Down Reset Working Register ALU Status Register Port PC0~PC7 8 bits Port C 8-bit Timer/Counter Prescale WDT/OST Timer RTCC This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 14 2005/6 VER 1.3 MDT2020(DF) 13. External Capacitor Selection For Crystal Oscillator @ V dd＝3.0 V~ 5.0 V Osc. Type HF XT LF Resonator Freq. C1 C2 20 MHz 5 pF ~10 pF 10 pF~30 pF 10 MHz 10 pF ~50 pF 20 pF ~100 pF 4 MHz 10 pF ~50 pF 20 pF ~100 pF 10 MHz 10 pF ~30 pF 10 pF ~50 pF 4 MHz 10 pF ~50 pF 20 pF ~100 pF 1 MHz 10 pF ~30 pF 20 pF ~50 pF 1 MHz 3 pF ~5 pF 3 pF ~5 pF 455 K 10 pF ~30 pF 20 pF ~50 pF 32 K 10 pF ~20 pF 15 pF ~30 pF MDT2020 OSC1 C1 OSC2 C2 To increase the stability of oscillator and the ability of anti-noise, the above values of the external capacitor range can be recommended for reference, but the higher capacitance also increases the start-up time. This specification are subject to be changed without notice. Any latest information please preview http;//www.mdtic.com.tw P. 15 2005/6 VER 1.3