m30833fjgp Renesas Electronics Corporation., m30833fjgp Datasheet - Page 263
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m30833fjgp
Manufacturer Part Number
m30833fjgp
Description
Renesas 16/32-bit Single-chip Microcomputer M16c Family / M32c/80 Series
Manufacturer
Renesas Electronics Corporation.
Datasheet
1.M30833FJGP.pdf
(527 pages)
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M
18. D/A Converter
e
E
3
. v
J
Table 18.1 D/A Converter Specifications
Table 18.2 Pin Settings
2
0
The D/A converter consists of two separate 8-bit R-2R ladder D/A converters.
Digital code is converted to an analog voltage when a value is written to the corresponding DAi registers
(i=0,1). The DAiE bit in the DACON register determines whether the D/A conversion result is output or not.
Set the DAiE bit to "1" (output enabled) to disable a pull-up of a corresponding port.
Output analog voltage (V) is calculated from value n (n=decimal) set in the DAi register.
Table 18.1 lists specifications of the D/A converter. Table 18.2 lists pin settings of the DA0 and DA1 pins.
Figure 18.1 shows a block diagram of the D/A converter. Figure 18.2 shows the D/A control register. Figure
18.3 shows a D/A converter equivalent circuit.
When the D/A converter is not used, set the DAi register to "00
D/A Conversion Method
Resolution
Analog Output Pin
P9
P9
NOTES:
1
9
C
3 .
B
8 /
1. Set the PD9 and PS3 registers immediately after the PRC2 bit in the PRCR register is set to "1" (write
Port
3
4
0
1
3
0
enable). Do not generate an interrupt or a DMA transfer between the instruction to set the PRC2 bit to "1"
and the instruction to set the PD9 and PS3 registers.
3
J
G
4
a
0 -
n
o r
V
V =
3 .
1
Item
u
REF
, 1
3
p
1
DA
DA
2
(
M
0
: reference voltage (not related to VCUT bit setting in the ADiCON1 register)
V
0
1
0
3
REF
output
output
6
256
2
Function
C
Page 240
8 /
x n
, 3
M
(n = 0 to 255)
3
R-2R
8 bits
2 channels
2
C
f o
8 /
PD9 Register
PD9_3=0
PD9_4=0
4
3
8
) T
8
(1)
PS3 Register
PS3_3=0
PS3_4=0
Bit and Setting
Specification
16
(1)
" and the DAiE bit to "0" (output disabled).
PSL3 Register
PSL3_3=1
PSL3_4=1
18. D/A Converter
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