NEC PD78052 - HALT Mode Release by RESET Input; Operation after HALT Mode Release

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CHAPTER 23 STANDBY FUNCTION
(d) Clear upon RESET input
When a RESET signal is input, the HALT mode is released, and as is the case with normal reset
operation, a program is executed after branch to the reset vector address.
Figure 23-3. HALT Mode Release by RESET Input
Remarks 1. f
X: main system clock oscillation frequency
2. ( ): f
X: 5.0 MHz
Table 23-2. 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
Test input 0 – ××Next address instruction execution
1–××HALT mode hold
RESET input – – ××Reset processing
Remark x: 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
/f x : 26.2 ms)