DF2148ATE20 Renesas Electronics America, DF2148ATE20 Datasheet - Page 232

• Manufacturer Part Number: DF2148ATE20
• Description: IC H8S MCU FLASH 128K 100-QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2100r

Specifications of DF2148ATE20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: Host Interface, I²C, IrDA, SCI
• Peripherals: POR, 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 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: HD64F2148ATE20; HD64F2148ATE20

Section 7 Data Transfer Controller (DTC)
7.2.5
Bit
Initial value
Read/Write
CRA is a 16-bit register that designates the number of times data is to be transferred by the DTC.
In normal mode, the entire CRA register functions as a 16-bit transfer counter (1 to 65,536). It is
decremented by 1 every time data is transferred, and transfer ends when the count reaches H'0000.
In repeat mode or block transfer mode, CRA is divided into two parts: the upper 8 bits (CRAH)
and the lower 8 bits (CRAL). CRAH holds the number of transfers while CRAL functions as an
8-bit transfer counter (1 to 256). CRAL is decremented by 1 every time data is transferred, and the
contents of CRAH are transferred when the count reaches H'00. This operation is repeated.
7.2.6
Bit
Initial value
Read/Write
CRB is a 16-bit register that designates the number of times data is to be transferred by the DTC in
block transfer mode. It functions as a 16-bit transfer counter (1 to 65,536) that is decremented by 1
every time data is transferred, and transfer ends when the count reaches H'0000.
Rev. 4.00 Sep 27, 2006 page 186 of 1130
REJ09B0327-0400
DTC Transfer Count Register A (CRA)
DTC Transfer Count Register B (CRB)
Unde-
Unde-
fined
fined
15
15
—
—
Unde-
Unde-
fined
fined
14
14
—
—
Unde-
Unde-
fined
fined
13
13
—
—
Unde-
Unde-
fined
fined
12
12
—
—
CRAH
Unde-
Unde-
fined
fined
11
11
—
—
Unde-
Unde-
fined
fined
10
10
—
—
Unde-
Unde-
fined
fined
—
—
9
9
Unde-
Unde-
fined
fined
—
—
8
8
Unde-
Unde-
fined
fined
—
—
7
7
Unde-
Unde-
fined
fined
—
—
6
6
Unde-
Unde-
fined
fined
—
—
5
5
Unde-
Unde-
fined
fined
—
—
4
4
CRAL
Unde-
Unde-
fined
fined
—
—
3
3
Unde-
Unde-
fined
fined
—
—
2
2
Unde-
Unde-
fined
fined
—
—
1
1
Unde-
Unde-
fined
fined
—
—
0
0