TMP86xy44UG Toshiba, TMP86xy44UG Datasheet - Page 157

• Manufacturer Part Number: TMP86xy44UG
• Manufacturer: Toshiba

Specifications of TMP86xy44UG

• Package: QFP44
• Rom Types (m=mask,p=otp,f=flash): M/P
• Rom Size: 60
• Ram Size: 1K
• Driver Led: 19
• Driver Lcd: -
• Spi/sio Channels: 1
• Uart/sio Channels: 1
• I2c/sio Channels: -
• High-speed Serial Output: -
• Adc 8-bit Channels: -
• Adc 10-bit Channels: 8
• Da Converter Channels: 1
• Timer Counter 18-bit Channel: -
• Timer Counter 16-bit Channel: 2
• Timer Counter 8-bit Channel: 2
• Motor Channels: -
• Watchdog Timer: Y
• Dual Clock: Y
• Clock Gear: -
• Number Of I/o Ports: 35
• Power Supply (v): 4.5 to 5.5

14.1 Register Configuration
14.1.1 DA Converter Operation
Figure 14-2 DA conversion result (8-bit digital) vs Analog output voltage
An analog voltage reference is DAREF = (A
Note 1: Analog reference voltage
Note 2: Analog output pin
Note 3: Anti-noise measure
1. Starting DA conversion operation
2. Logical expression for converted value
3. The relation between DA conversion result and Analog output voltage.
VOA
DA converter operation is activated by setting DACCR<DADRV0> to “1”. The digital value in
DACDR is converted into an analog value and is output from the DAO pin.
After resetting, DACCR and DACDR are cleared to “0”. The DA converter goes the power down.
(DAO analog level is 0 V.)
The relation between a digital value and analog output voltage in DACDR can be expressed in the fol-
lowing equation.
*DAREF = A
An analog voltage between A
Make sure the analog referrence pins (A
It needs that these reference voltage are supplied from a stable power supply.
The analog output pin (DAO) is dedicated to analog output to ensure the precision and characteristics of
DA conversion. While DA conversion is being performed, do not execute input/output instructions on the
adjacent port. Otherwise, the precision of DA conversion may be adversely affected. Also note that DAO is
susceptible to noise (especially power supply noise) in some cases.
To ensure the characteristics of DA conversion, place a bypass capacitor between the A
as near to the IC as possible. It is recommended to use a tantalum capacitor (10 μF) and multilayer ceramic
capacitor (0.1 μF) in combination.
=
32
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ -
32 + 255
32 + 254
32 + 253
32 + 252
32 + 3
32 + 2
32 + 1
32 + 0
+
304
304
304
304
304
304
304
304
2
0
×
DAO0
VDD
Analog
DAREF
DAREF
DAREF
DAREF
voltage
DAREF
DAREF
DAREF
DAREF
output
- A
+
AVDD
AVSS
2
1
VSS
×
DAO1
VDD
+
and A
2
2
00
×
DAO2
Ideal conversion characteristic
H
VSS
Page 146
VDD
01
H
VDD
(= DAREF) is output in 8-bit resolution.
, A
02
+
2
H
VSS
3
03
- A
×
DAO3
) are used at recomended operating condition.
H
VSS
304
).
+
2
4
×
DAO4
FC
H
+
FD
2
5
H
×
FE
DAO5
H
FF
H
+
2
6
×
DAO6
VDD
+
and A
2
TMP86CS44UG
7
×
DAO7
VSS
pins
×
DAREF