E202075_HD404889 Datasheet, PDF (59/202 Pages) Renesas Technology Corp – Low-Voltage AS Microcomputers with On-Chip LCD Circuit

Active mode
HD404889/HD404899/HD404878/HD404868 Series
Watch mode
Oscillation
stabilization
period
Active mode
Interrupt
strobe
INT0
Interrupt
request generation
Only in case of
transition to active
mode
T
T
tRC
TX
T: Interrupt frame period
tRC : Oscillation stabilization period
Note: If the time from the fall of the INT₀ or WU₀ to WU₃ signal until the interrupt is accepted and
active mode is entered and is designated TX, then TX will be in the following range :
T+tRC≤TX≤2T+tRC (MIS1, MIS0=00)
tRC≤TX≤T+tRC (MIS1, MIS0=01 or 10)
Figure 16 Interrupt Frame
Miscellaneous Register (MIS: $005)
Bit
3
2
1
0
Read/Write
W
W
W
Reset
0
0
0
Bit name
MIS3
MIS1 MIS0
Buffer control
See section 3,
Input/Output,
and Figure 33
Interrupt Frame Oscillation Settling Oscillator Circuit
MIS1 MIS0 _{period T(ms)*1 Time tRC(ms)*1}
Condition
0
0
1
1
0
1
0.24414
0.12207(0.24414)*² External clock input
3.90625
7.8125
Ceramic resonator
3.90625
31.25
Crystal resonator
Not used
Notes: 1. T and tRC values are for use of a 32.768 kHz crystal oscillator at the X1-X2 pins.
2. This value applies only in case of direct transition operation.
Figure 17 Miscellaneous Register (MIS)
57