IBM PD78P081(A2) Network Card User Manual


 
197
CHAPTER 13 STANDBY FUNCTION
(c) Clear upon RESET input
As is the case with normal reset operation, a program is executed after branch to the reset vector address.
Figure 13-3. HALT Mode Release by RESET Input
Remarks 1. f
X: main system clock oscillation frequency
2. Values in parentheses when operated at f
x = 5.0 MHz
Table 13-2. Operation after HALT Mode Release
Release Source MK×× PR×× IE ISP Operation
Maskable interrupt 0 0 0 × Next address instruction execution
request 0 0 1 × Interrupt service execution
0 1 0 1 Next address instruction execution
01×0
0 1 1 1 Interrupt service execution
1 ×××HALT mode hold
Non-maskable interrupt ××Interrupt service execution
request
RESET input ××Reset processing
Remark ×: Don’t care
HALT
Instruction
RESET
Signal
Operating
Mode
Clock
Reset
PeriodHALT Mode
Oscillation
Oscillation
stop
Oscillation
Stabilization
Wait Status
Operating
Mode
Oscillation
Wait
(2
17
/fx : 26.2 ms)