DF2148BTE20 Renesas Electronics America, DF2148BTE20 Datasheet - Page 530
![IC H8S MCU FLASH 128K 100-QFP](/photos/28/61/286108/100-tqfp_sml.jpg)
DF2148BTE20
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
HD64F2148BTE20
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
DF2148BTE20V
Manufacturer:
Renesas Electronics America
Quantity:
10 000
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Section 16 I
Notes on Initialization:
The value of the BBSY bit cannot be modified directly by this module clear function, but since the
stop condition pin waveform is generated according to the state and release timing of the SCL and
SDA pins, the BBSY bit may be cleared as a result. Similarly, state switching of other bits and
flags may also have an effect.
To prevent problems caused by these factors, the following procedure should be used when
initializing the IIC state.
1. Execute initialization of the internal state according to the setting of bits CLR3 to CLR0 or
2. Execute a stop condition issuance instruction (write 0 to BBSY and SCP) to clear the BBSY
3. Re-execute initialization of the internal state according to the setting of bits CLR3 to CLR0 or
4. Initialize (re-set) the IIC registers.
Rev. 3.00 Mar 21, 2006 page 474 of 788
REJ09B0300-0300
Interrupt flags and interrupt sources are not cleared, and so flag clearing measures must be
taken as necessary.
Basically, other register flags are not cleared either, and so flag clearing measures must be
taken as necessary.
When initialization is executed by DDCSWR, the write data for bits CLR3 to CLR0 is not
retained. To perform IIC clearance, bits CLR3 to CLR0 must be written to simultaneously
using an MOV instruction. Do not use a bit manipulation instruction such as BCLR.
Similarly, when clearing is required again, all the bits must be written to simultaneously in
accordance with the setting.
If a flag clearing setting is made during transmission/reception, the IIC module will stop
transmitting/receiving at that point and the SCL and SDA pins will be released. When
transmission/reception is started again, register initialization, etc., must be carried out as
necessary to enable correct communication as a system.
ICE bit clearing.
bit to 0, and wait for two transfer rate clock cycles.
ICE bit clearing.
2
C Bus Interface (IIC) (Optional)
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