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90 Rabbit 3000 Microprocessor
7.6 Output Pins CLK, STATUS, /WDTOUT, /BUFEN
Certain output pins can have alternate assignments as specified in Table 7-9.
Table 7-9. Global Output Control Register (GOCR = 0x0E)
Bit(s) Value Description
7:6
00 CLK pin is driven with peripheral clock.
01 CLK pin is driven with peripheral clock divided by 2.
10 CLK pin is low.
11 CLK pin is high.
5:4
00 STATUS pin is active (low) during a first opcode byte fetch.
01 STATUS pin is active (low) during an interrupt acknowledge.
10 STATUS pin is low.
11 STATUS pin is high.
3
1 WDTOUTB pin is low (1 cycle minimum, 2 cycles maximum, of 32 kHz).
0 WDTOUTB pin follows watchdog function.
2 x This bit is ignored.
1:0
00 /BUFEN pin is active (low) during external I/O cycles.
01 /BUFEN pin is active (low) during data memory accesses.
10 /BUFEN pin is low.
11 /BUFEN pin is high.