HD64F3026X25 Renesas Electronics America, HD64F3026X25 Datasheet - Page 495

• Manufacturer Part Number: HD64F3026X25
• Description: MCU 3V 256K 100-TQFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8/300Hr

Specifications of HD64F3026X25

• Core Processor: H8/300H
• Core Size: 16-Bit
• Speed: 25MHz
• Connectivity: SCI, SmartCard
• Peripherals: PWM, WDT
• Number Of I /o: 70
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 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: -

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. In the second and
subsequent conversions the conversion time is fixed at 128 states when CKS = 0 or 66 states when
CKS = 1.
Address bus
Write signal
Input sampling
timing
ADF
Legend:
(1):
(2):
t :
t
t
D
SPL
CONV
Input Sampling and A/D Conversion Time
D
:
varies depending on the timing of the write access to ADCSR. The total conversion
:
ADCSR write cycle
ADCSR address
Synchronization delay
Input sampling time
A/D conversion time
D
after the ADST bit is set to 1, then starts conversion. Figure 14.5 shows the A/D
(1)
(2)
t
D
Figure 14.5 A/D Conversion Timing
t
SPL
t
CONV
Rev. 2.00 Sep 20, 2005 page 455 of 800
D
and the input sampling time. The
Section 14 A/D Converter
REJ09B0260-0200