HD6432646 Hitachi, HD6432646 Datasheet - Page 686
HD6432646
Manufacturer Part Number
HD6432646
Description
(HD64F264x Series) 16-Bit Microcomputer
Manufacturer
Hitachi
Datasheet
1.HD6432646.pdf
(1155 pages)
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Table 18-4 Power-Down Modes and Display Operation
Mode
Clock
Display
operation
Notes: *1 The subclock oscillator does not stop, but clock supply is halted.
18.3.4
When a panel is driven, the on-chip power supply capacity may be insufficient. The recommended
solution in this case is to connect bypass capacitors of around 0.1 to 0.3 µF to pins V1 to V3, or to
connect a new split-resistance externally, as shown in figure 18-13.
652
*2 The LCD drive power supply is turned off regardless of the setting of the PSW bit.
*3 Display operation is performed only if ø
*4 The clock supplied to the LCD stops.
ø
ø
ACT = 0
ACT = 1
Boosting the LCD Drive Power Supply
SUB
H8S/2646 Series
clock.
LPV
V
SS
Reset Active
Runs
Runs
Stops
Stops
Figure 18-13 Connection of External Split-Resistance
CC
Runs
Runs
Stops
Functions Functions Functions
V1
V2
V3
Sleep
Runs
Runs
Stops
VR
R
R
R
Watch
Stops
Runs
Stops
SUB
R =
, ø
SUB
*3
several k to
several M
/2, or ø
Subactive Subsleep
Stops
Runs
Stops
Functions
SUB
* 3
/4 is selected as the operating
Stops
Runs
Stops
Functions
C = 0.1 to 0.3 F
* 3
Standby
Stops
Stops
Stops
Stops
*1
*2
*2
Module
Standby
Stops
Stops
Stops
Stops
*4
*4
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