R8C/2E Group, R8C/2F Group 5. Electrical Characteristics
Rev.1.00 Dec 14, 2007 Page 25 of 39
REJ03B0222-0100
Figure 5.1 Ports P0, P1, and P3 to P5 Timing Measurement Circuit
NOTES:
1. AV
CC = 2.7 to 5.5 V at Topr = −20 to 85°C (N version) / −40 to 85°C (D version), unless otherwise specified.
2. When the analog input voltage is over the reference voltage, the A/D conversion result will be 3FFh in 10-bit mode and FFh in
8-bit mode.
NOTES:
1. AV
CC = 2.7 to 5.5 V at Topr = −20 to 85°C (N version) / −40 to 85°C (D version), unless otherwise specified.
2. This applies when one D/A converter is used and the value of the DAi register (i = 0 or 1) for the unused D/A converter is 00h.
The resistor ladder of the A/D converter is not included. Also, even if the VCUT bit in the ADCON1 register is set to 0 (V
REF
not connected), I
Vref flows into the D/A converters.
Table 5.3 A/D Converter Characteristics
Symbol Parameter Conditions
Standard
Unit
Min. Typ. Max.
− Resolution V
ref = AVCC −−10 Bits
− Absolute
accuracy
10-bit mode φ
AD = 10 MHz, Vref = AVCC = 5.0 V −−±3 LSB
8-bit mode φ
AD = 10 MHz, Vref = AVCC = 5.0 V −−±2 LSB
10-bit mode φ
AD = 10 MHz, Vref = AVCC = 3.3 V −−±5 LSB
8-bit mode φ
AD = 10 MHz, Vref = AVCC = 3.3 V −−±2 LSB
R
ladder Resistor ladder Vref = AVCC 10 − 40 kΩ
t
conv Conversion time 10-bit mode φAD = 10 MHz, Vref = AVCC = 5.0 V 3.3 −−µs
8-bit mode φ
AD = 10 MHz, Vref = AVCC = 5.0 V 2.8 −−µs
V
ref Reference voltage 2.7 − AVCC V
V
IA
Analog input voltage
(2)
0 − AVCC V
− A/D operating
clock frequency
Without sample and hold V
ref = AVCC = 2.7 to 5.5 V 0.25 − 10 MHz
With sample and hold V
ref = AVCC = 2.7 to 5.5 V 1 − 10 MHz
Table 5.4 D/A Converter Characteristics
Symbol Parameter Conditions
Standard
Unit
Min. Typ. Max.
− Resolution −−8Bit
− Absolute accuracy −−1.0 %
t
su Setup time −−3 µs
R
O Output resistor 4 10 20 kΩ
I
Vref Reference power input current (NOTE 2) −−1.5 mA
P0
P1
P3
P4
P5
30pF
