DF2345TE20 Renesas Electronics America, DF2345TE20 Datasheet - Page 547

• Manufacturer Part Number: DF2345TE20
• Description: MCU 5V 128K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2345TE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: POR, PWM, WDT
• Number Of I /o: 71
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 4K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -20°C ~ 75°C
• Package / Case: 100-TQFP, 100-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Other names: HD64F2345TE20; HD64F2345TE20

14.4.3
The A/D converter has a built-in sample-and-hold circuit. The A/D converter samples the analog
input at a time t
conversion timing. Table 14.4 indicates the A/D conversion time.
As indicated in figure 14.5, the A/D conversion time includes t
length of t
time therefore varies within the ranges indicated in table 14.4.
In scan mode, the values given in table 14.4 apply to the first conversion time. In the second and
subsequent conversions the conversion time is fixed at 256 states when CKS = 0 or 128 states
when CKS = 1.
Input Sampling and A/D Conversion Time
D
Address bus
Write signal
Input sampling
timing
ADF
Legend:
(1)
(2)
t
t
t
D
SPL
CONV
varies depending on the timing of the write access to ADCSR. The total conversion
D
after the ADST bit is set to 1, then starts conversion. Figure 14.5 shows the A/D
: ADCSR write cycle
: ADCSR address
: A/D conversion start delay
: Input sampling time
: A/D conversion time
(1)
(2)
Figure 14.5 A/D Conversion Timing
t
D
t
SPL
t
CONV
Rev. 4.00 Feb 15, 2006 page 521 of 900
D
and the input sampling time. The
Section 14 A/D Converter
REJ09B0291-0400