HD404369 Datasheet, PDF (91/117 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

HD404369 Series
A/D Data Register (ADRL: $017, ADRU: $018): Eight-bit read-only register consisting of a 4-bit lower
digit and 4-bit upper digit. This register is not cleared by reset. After the completion of A/D conversion, the
resultant eight-bit data is held in this register until the start of the next conversion (figures 75, 76, and 77).
ADRU: $018
3
2
1
0
ADRL: $017
3
2
1
0
MSB
LSB
Bit 7
Bit 0
Figure 75 A/D Data Registers (ADRU, ADRL)
A/D data register (lower digit) (ADRL: $017)
Bit
Initial value
Read/Write
Bit name
3
0
R
ADRL3
2
0
R
ADRL2
1
0
R
ADRL1
0
0
R
ADRL0
Figure 76 A/D Data Register Lower Digit (ADRL)
A/D data register (upper digit) (ADRU: $018)
Bit
Initial value
Read/Write
Bit name
3
1
R
ADRU3
2
0
R
ADRU2
1
0
R
ADRU1
0
0
R
ADRU0
Figure 77 A/D Data Register Upper Digit (ADRU)
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