trunk/src/emu/machine/pit8253.h
| r32601 | r32602 | |
|---|
| 1 | 1 | /*************************************************************************** |
| 2 | 2 | |
| 3 | 3 | Intel 8253/8254 |
| 4 | | |
| 5 | 4 | Programmable Interval Timer |
| 6 | 5 | |
| 6 | As uPD71054C (8MHz), uPD71054C-10 (10MHz) - it is a clone of Intel 82C54 |
| 7 | also available in 28-pin QFP and 44-pin PLCC (many pins NC) |
| 8 | |
| 7 | 9 | _____ _____ |
| 8 | 10 | D7 1 |* \_/ | 24 VCC |
| 9 | 11 | D6 2 | | 23 _WR |
| r32601 | r32602 | |
|---|
| 19 | 21 | GND 12 |_____________| 13 OUT1 |
| 20 | 22 | |
| 21 | 23 | |
| 22 | | ********************************************************************** |
| 23 | | _____ _____ |
| 24 | | D7 <-> 1 |* \_/ | 24 --- Vdd |
| 25 | | D6 <-> 2 | | 23 <-- _WR |
| 26 | | D5 <-> 3 | | 22 <-- _RD |
| 27 | | D4 <-> 4 | | 21 <-- _CS |
| 28 | | D3 <-> 5 | | 20 <-- A1 |
| 29 | | D2 <-> 6 | uPD71054C | 19 <-- A0 |
| 30 | | D1 <-> 7 | | 18 <-- CLK2 |
| 31 | | D0 <-> 8 | | 17 --> OUT2 |
| 32 | | CLK0 --> 9 | | 16 <-- GATE2 |
| 33 | | OUT0 <-- 10 | | 15 <-- CLK1 |
| 34 | | GATE0 --> 11 | | 14 <-- GATE1 |
| 35 | | GND --- 12 |_____________| 13 --> OUT1 |
| 36 | | |
| 37 | | uPD71054C (8MHz), uPD71054C-10 (10MHz) - it is a clone of Intel 82C54 |
| 38 | | also available in 28-pin QFP and 44-pin PLCC (many pins NC) |
| 39 | | |
| 40 | | |
| 41 | 24 | ***************************************************************************/ |
| 42 | 25 | |
| 43 | 26 | #ifndef __PIT8253_H__ |