HD64F2612FA20 Renesas Electronics America, HD64F2612FA20 Datasheet - Page 484
HD64F2612FA20
Manufacturer Part Number
HD64F2612FA20
Description
IC H8S MCU FLASH 128K 80QFP
Manufacturer
Renesas Electronics America
Series
H8® H8S/2600r
Specifications of HD64F2612FA20
Core Processor
H8S/2600
Core Size
16-Bit
Speed
20MHz
Connectivity
CAN, SCI
Peripherals
POR, PWM, WDT
Number Of I /o
43
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 12x10b
Oscillator Type
Internal
Operating Temperature
-20°C ~ 75°C
Package / Case
80-QFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
HD64F2612FA20
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
Part Number:
HD64F2612FA20J
Manufacturer:
RENESAS/瑞萨
Quantity:
20 000
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Section 16 A/D Converter
16.7
16.7.1
Operation of the A/D converter can be disabled or enabled using the module stop control register.
The initial setting is for operation of the A/D converter to be halted. Register access is enabled by
clearing module stop mode. For details, refer to section 20, Power-Down Modes.
16.7.2
This LSI's analog input is designed such that conversion precision is guaranteed for an input signal
for which the signal source impedance is 5 kΩ or less. This specification is provided to enable the
A/D converter's sample-and-hold circuit input capacitance to be charged within the sampling time;
if the sensor output impedance exceeds 5 kΩ, charging may be insufficient and it may not be
possible to guarantee A/D conversion precision. However, for A/D conversion in single mode with
a large capacitance provided externally, the input load will essentially comprise only the internal
input resistance of 10 kΩ, and the signal source impedance is ignored. However, as a low-pass
filter effect is obtained in this case, it may not be possible to follow an analog signal with a large
differential coefficient (e.g., 5 mV/μs or greater) (see figure 16.6). When converting a high-speed
analog signal, a low-impedance buffer should be inserted.
16.7.3
Adding capacitance results in coupling with GND, and therefore noise in GND may adversely
affect absolute precision. Be sure to make the connection to an electrically stable GND such as
AVss.
Care is also required to insure that filter circuits do not communicate with digital signals on the
mounting board (i.e, acting as antennas).
Rev. 7.00 Sep. 11, 2009 Page 448 of 566
REJ09B0211-0700
Usage Notes
Permissible Signal Source Impedance
Influences on Absolute Precision
Module Stop Mode Setting
Sensor input
Sensor output
impedance
to 5 kΩ
Low-pass
filter C
to 0.1 μF
Figure 16.6 Example of Analog Input Circuit
This LSI
C
15 pF
in
=
A/D converter
equivalent circuit
10 kΩ
20 pF
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