HD64F2638F20J Renesas Electronics America, HD64F2638F20J Datasheet - Page 746

• Manufacturer Part Number: HD64F2638F20J
• Description: IC H8S MCU FLASH 256K 128-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2600r

Specifications of HD64F2638F20J

• Core Processor: H8S/2600
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: CAN, SCI, SmartCard
• Peripherals: Motor Control PWM, POR, PWM, WDT
• Number Of I /o: 72
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 12x10b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

Section 17 A/D Converter
17.4.3
The A/D converter has an on-chip sample-and-hold circuit. The A/D converter samples the analog
input at a time t
conversion timing. Table 17-4 indicates the A/D conversion time.
As indicated in figure 17-5, the A/D conversion time includes t
length of t
time therefore varies within the ranges indicated in table 17-4.
In scan mode, the values given in table 17-4 apply to the first conversion time. The values given in
table 17-5 apply to the second and subsequent conversions. In both cases, set bits CKS1 and CKS0
in ADCR to give a conversion time of at least 10 µs.
Page 696 of 1458
Input Sampling and A/D Conversion Time
D
φ
Input sampling
timing
ADF
Address
Write signal
varies depending on the timing of the write access to ADCSR. The total conversion
Legend:
(1):
(2):
t
t
t
D
SPL
CONV
:
D
after the ADST bit is set to 1, then starts conversion. Figure 17-5 shows the A/D
:
: A/D conversion time
ADCSR write cycle
ADCSR address
A/D conversion start delay
Input sampling time
(1)
(2)
Figure 17-5 A/D Conversion Timing
t
D
t
SPL
t
CONV
D
and the input sampling time. The
H8S/2639, H8S/2638, H8S/2636,
REJ09B0103-0800 Rev. 8.00
H8S/2630, H8S/2635 Group
May 28, 2010