M30802FCGP#D3 Renesas Electronics America, M30802FCGP#D3 Datasheet - Page 189

• Manufacturer Part Number: M30802FCGP#D3
• Description: IC M16C MCU FLASH 128K 144LQFP
• Manufacturer: Renesas Electronics America
• Series: M16C™ M16C/80r

Specifications of M30802FCGP#D3

• Core Processor: M16C/80
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SIO, UART/USART
• Peripherals: DMA, PWM, WDT
• Number Of I /o: 121
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 10K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 5.5 V
• Data Converters: A/D 10x10b, D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 144-LQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

M
R
R
22. D/A Converter
e
E
1
v
Table 22.1 Performance of D/A converter
Figure 22.1 Block diagram of D/A converter
J
6
1 .
0
This is an 8-bit, R-2R type D/A converter. The microcomputer contains two independent D/A converters of this type.
D/A conversion is performed when a value is written to the corresponding D/A register. Bits 0 and 1 (D/A
output enable bits) of the D/A control register decide if the result of conversion is to be output. Set the
function select register A3 to I/O port, the related input peripheral function of the function select register B3
to disabled and the direction register to input mode. When the D/A output is enabled, the pull-up function of
the corresponding port is automatically disabled.
Output analog voltage (V) is determined by a set value (n : decimal) in the D/A register.
Table 22.1 lists the performance of the D/A converter. Figure 22.1 shows the block diagram of the D/A
converter. Figure 22.2 shows the D/A control register.
Conversion method
Resolution
Analog output pin
C
9
0 .
8 /
B
0
0
0
1
A
8
G
u
7
o r
. g
0 -
u
1
0
Item
p
0
, 2
0
2
V = V
V
0
0
REF
5
Data bus low-order bits
Page 176
REF
: reference voltage
R-2R resistance ladder
X n/ 256 (n = 0 to 255)
D/A register i (8) (i = 0, 1)
f o
R-2R method
8 bits
2 channels
3
2
9
(Address 0398
D/Ai output enable bit (i = 0, 1)
Performance
16
P9
P9
, 039A
3
4
/ DA
/ DA
16
0
1
)
22. D/A Converter