COUNTER CONFIGURATION
BADR3 + 13 hex
READ/WRITE
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
|
|
|
|
|
|
|
D7 | D6 | D5 | D4 | D3 | D2 | D1 | D0 |
|
|
|
|
|
|
|
|
This register is used to set the operating modes of each of the 82C54’s counters. Configure the counters by writing mode information to the Configure register, followed by the count information written to the specific counter (data) registers. Refer to the Celeritous 82C54 data sheets for more detailed information.
5.4.6 8255 Interrupt Source Configure
BADR3 + 14 hex
READ/WRITE
7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|
|
|
|
|
|
|
|
DIRQ1 | DIRQ0 | CIRQ1 | CIRQ0 | BIRQ1 | BIRQ0 | AIRQ1 | AIRQ0 |
|
|
|
|
|
|
|
|
DIRQ1 | When this bit is set, the 8255 in Group 3 will generate an interrupt on | ||||||
| INTRB if INTEN in BASE +15 hex is also set. |
|
| ||||
DIRQ0 | When this bit is set, the 8255 in Group 3 will generate an interrupt on | ||||||
| INTRA if INTEN in BASE +15 hex is also set. |
|
| ||||
CIRQ1 | When this bit is set, the 8255 in Group 2 will generate an interrupt on | ||||||
| INTRB if INTEN in BASE +15 hex is also set. |
|
| ||||
CIRQ0 | When this bit is set, the 8255 in Group 2 will generate an interrupt on | ||||||
| INTRA if INTEN in BASE +15 hex is also set. |
|
| ||||
BIRQ1 | When this bit is set, the 8255 in Group 1 will generate an interrupt on | ||||||
| INTRB if INTEN in BASE +15 hex is also set. |
|
| ||||
BIRQ0 | When this bit is set, the 8255 in Group 1 will generate an interrupt on | ||||||
| INTRA if INTEN in BASE +15 hex is also set. |
|
| ||||
AIRQ1 | When this bit is set, the 8255 in Group 0 will generate an interrupt on | ||||||
| INTRB if INTEN in BASE +15 hex is also set. |
|
| ||||
AIRQ0 | When this bit is set, the 8255 in Group 0 will generate an interrupt on | ||||||
| INTRA if INTEN in BASE +15 hex is also set. |
|
| ||||
16
