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- The XC68HC11A1P basic circuit.
-
- $VER: XC68HC11A1P_basic_circuit 1.0 (5-Jul-93)
-
- This file should be viewed with a PC style font like
- CleanIBM, or you can use my modified PC font called
- Schematic font. Either change font in your favorite text
- editor or do "SetFont Schematic 8" from DOS. And then type
- or More the file. Remember to copy the Schematic font to
- your FONTS: assign.
-
- This schematic shows all that's needed to get a Hc11
- microcontroller running. It's based on the XC68HC11A1P the
- 48 pin DIL version, since that one is probably the Hc11
- version that's easiest to play with since you can hook it
- up on a breadboard (or protoboard. I'm thinking of the ones
- that you just stick the ICs and cables in, no soldering
- type boards). But it should apply to any Hc11 with only
- minor changes.
-
- Remember that Å means the crossing wires are NOT connected.
- Â, ´, Ã and Á means the wires are connected.
-
- ÚÄÄÄÄÄÄÄÄÄÄÂÄÂÄÄÄÄÄÄÄÄÄÄ¿ Vdd ÚÄIC-02Ä¿ Vdd
- VddÄR1´1 PA7 ÀÄÙ Vdd 48ÃÄÄÄÂÄÄÄÁÄÄÂÄÄÂÄÄ´2 Vdd ³ ³
- ´2 PA6 PD5 47ÃR1Ä´ + ³ ³ Gnd 3ÃGnd R1
- ´3 PA5 PD4 46ÃR1Ä´ C2 C3 ³Reset 1ÃÄÄÄÄÄÄ´
- ´4 PA4 PD3 45ÃR1Ä´ ÀÄÄ´ ÀÄÄÄÄÄÄÄÙ ³
- ´5 PA3 PD2 44ÃR1Ä´ Gnd ³
- VddÂÄR1´6 PA2 TxD PD1 43ÃR1Ä´ ³
- ÃÄR1´7 PA1 RxD PD0 42ÃR1Ä´ ³
- ÀÄR1´8 PA0 /IRQ 41ÃR2Ä´ ³
- ´9 PB7 /XIRQ 40ÃR2Ä´ ³
- ´10 PB6 /RESET 39ÃÄÄÄÅÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄÄ´
- ´11 PB5 PC7 38ÃR1Ä´ ³
- ´12 PB4 PC6 37ÃR1Ä´ Reset o
- ´13 PB3 PC5 36ÃR1Ä´ Switch o
- ´14 PB2 PC4 35ÃR1Ä´ (Push ³
- ´15 PB1 PC3 34ÃR1Ä´ type) ³
- ´16 PB0 PC2 33ÃR1Ä´ ³
- ´17 PE0 PC1 32ÃR1Ä´ Gnd
- ´18 PE1 PC0 31ÃR1ÄÙ ÚÄÂÄÄÂÄÄC1Ä¿
- ´19 PE2 XTAL 30ÃÄÄÄÄÄÄÄÄÙ R3 X1 ³
- GndÂÄ¿ ´20 PE3 EXTAL 29ÃÄÄÄÄÄÄÄÄÄÄÁÄÄÁÄÄC1Ä´
- C4ÀÄÄ´21 Vrl R/W 28Ã ³
- VddÄR4ÁÄÄÄÄ´22 Vrh E 27Ã Gnd
- Gnd´23 Vss AS 26ÃR1ÄVdd
- VddÄR2ÄÂÄ´24 ModB ModA 25ÃÄÂÄR2ÄVdd
- ³ ÀÄÄÄÄÄÄÄÄÄIC-01ÄÄÄÄÄÄÄÄÄÙ ³
- ³ ³
- o Mod B o Mod A
- o Switch o Switch
- ³ ³
- Gnd Gnd
-
- Vss 0VDC
- Vdd +5VDC
- Gnd Ground
- R1 10Kohm
- R2 4.7Kohm
- R3 1Mohm - 20 Mohm
- R4 1Kohm
- X1 8Mhz (Max)
- C1 5pF - 25pF (Nominal. 18pF, Lower frequency = Lower capacitance)
- C2 Electrolytic 4.7uF
- C3 .1uF
- C4 1uF
- oo SPST switch
- IC-01 XC68HC11A1
- IC-02 MC 34064 or MC 33064
-
- All port resistors can be left out on a bench project. The only
- thing that happens is that the microcontroller will take a little
- more power.
-
- The Resetswitch can be left out in the final product if not needed.
-
- ÉÍÍÍÍÍÍÍÍÍÍÍËÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍ»
- º Inputs º º
- ÌÍÍÍÍÍËÍÍÍÍ͹ Mode Description º
- ºMod BºMod Aº º
- ÌÍÍÍÍÍÎÍÍÍÍÍÎÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÇ
- º 1 º 0 ºNormal Single Chipº
- º 1 º 1 º Normal Expanded º
- º 0 º 0 ºSpecial Bootstrap º
- º 0 º 1 º Special Test º
- ÈÍÍÍÍÍÊÍÍÍÍÍÊÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍÍͼ
-
- If you're not using the bus, which you won't be if you're just strted
- with the Hc11, then you should only use the Special Bootstrap mode. So
- connect both Mod Switches. You can even leave them out if you like, but
- remember to ground the Mod pins if you leave the switch out.
-
- If the RxD and TxD pins are connected to each other the Hc11 will jump
- to adress $b600 which is where the EEPROM is located on the A1. So
- you'll be able to asemble you program to EEPROM ($b600) and run it by
- connecting Tdx and RxD together. There's a switch for this purpose on
- my version of the voltage converter that you'll need to connect the
- Hc11 to your Amiga. Look at the file containing the voltage converter
- for more info.
-
- If the processor doesn't seem to start check that the Reset pin
- (39) is in it's high state. Possably remove IC-02 for a while to see
- if it works then. IC-02 resets the processor when voltage drops
- below 5VDC. The processor will still run at 3VDC at room temperature
- but when you power it on and off EEPROM contents may be lost if IC-02
- is not present.
-