HD404369 Datasheet, PDF (90/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

HD404369 Series
A/D Start Flag (ADSF: $02C, Bit 2): One-bit flag that initiates A/D conversion when set to 1. At the
completion of A/D conversion, the converted data is stored in the A/D data register and the A/D start flag is
cleared. Refer to figure 73.
A/D start flag (ADSF: $020, bit 2)
Bit
Initial value
Read/Write
Bit name
3
0
R/W
DTON
2
0
R/W
ADSF
1
0
W
WDON
0
0
R/W
LSON
A/D Start Flag (ADSF)
0
A/D conversion completed
1
A/D conversion started
DTON
Refer to the description of operating
modes
LSON
Refer to the description of operating
modes
WDON
Refer to the description of timers
Figure 73 A/D Start Flag (ADSF)
I_AD Off Flag (IAOF: $021, Bit 2): By setting the I_AD off flag to 1, the current flowing through the
resistance ladder can be cut off even while operating in standby or active mode, as shown in figure 74.
I_AD off flag (IAOF: $021, bit 2)
Bit
Initial value
Read/Write
Bit name
3
0
R/W
RAME
2
0
R/W
IAOF
1
0
R/W
ICEF
0
0
R/W
ICSF
I_AD Off Flag (IAOF)
0
I_AD current flows
1
I_AD current is cut off
RAME
Refer to the description of operating
modes
ICSF
Refer to the description of timers
ICEF
Refer to the description of timers
Figure 74 I_AD Off Flag (IAOF)
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