68681: Difference between revisions
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m (Created page with ''''Dual Asynchronous Receiver / Transmitter''' =Pinout= <pre> DIP40 +---\/---+ RS1 | 1 40| Vcc IP3 | 2 39| IP4 RS2 | 3 38| IP5 IP1 | 4 3…') |
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Latest revision as of 15:42, 9 November 2017
Dual Asynchronous Receiver / Transmitter
Pinout
DIP40
+---\/---+
RS1 | 1 40| Vcc
IP3 | 2 39| IP4
RS2 | 3 38| IP5
IP1 | 4 37| *IACK
RS3 | 5 36| IP2
RS4 | 6 35| *CS
IP0 | 7 34| *RESET
R/*W | 8 33| X2
*DTACK | 9 32| X1/CLK
RXDB |10 31| RxDA
TxDB |11 30| TxDA
OP1 |12 29| OP0
OP3 |13 28| OP2
OP5 |14 27| OP4
OP7 |15 26| OP6
D1 |16 25| D0
D3 |17 24| D2
D5 |18 23| D4
D7 |19 22| D6
GND |20 21| *IRQ
+--------+
Frequency
DIP40
Set reader to FREQ, put black probe to GND, red probe to 32 AND 33 to measure CPU clock
External links
Files
-
m68681 Datasheet
