DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 650

• Manufacturer Part Number: DF2148BTE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148BTE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: I²C, IrDA, SCI, X-Bus
• Peripherals: PWM, WDT
• Number Of I /o: 74
• 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: HD64F2148BTE20; HD64F2148BTE20

Section 21 A/D Converter
21.4.3
The A/D converter has a built-in sample-and-hold circuit. The A/D converter samples the analog
input when the A/D conversion start delay time (t
1, then starts A/D conversion. Figure 21.3 shows the A/D conversion timing. Table 21.3 indicates
the A/D conversion time.
As indicated in figure 21.3, the A/D conversion time (t
(t
conversion time therefore varies within the ranges indicated in table 21.3.
In scan mode, the values given in table 21.3 apply to the first conversion time. In the second and
subsequent conversions, the conversion time is 256 state (fixed) when CKS = 0 and 128 states
(fixed) when CKS = 1.
Rev. 3.00 Mar 21, 2006 page 594 of 788
REJ09B0300-0300
SPL
). The length of t
Input Sampling and A/D Conversion Time
Address
Write signal
Input sampling
timing
ADF
Legend:
(1)
(2)
t
t
t
D
SPL
CONV
D
: ADCSR write cycle
: ADCSR address
: A/D conversion start delay
: Input sampling time
: A/D conversion time
varies depending on the timing of the write access to ADCSR. The total
(1)
(2)
t D
Figure 21.3 A/D Conversion Timing
t SPL
D
) passes after the ADST bit in ADCSR is set to
t CONV
CONV
) includes t
D
and the input sampling time