DF2357F20 Renesas Electronics America, DF2357F20 Datasheet - Page 212

• Manufacturer Part Number: DF2357F20
• Description: IC H8S MCU FLASH 5V 128K 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2357F20

• Core Processor: H8S/2000
• Core Size: 16-Bit
• Speed: 20MHz
• Connectivity: SCI, SmartCard
• Peripherals: DMA, POR, PWM, WDT
• Number Of I /o: 87
• Program Memory Size: 128KB (128K x 8)
• Program Memory Type: FLASH
• Ram Size: 8K 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: 128-QFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -

(1) Normal Mode
ETCRA
In normal mode, ETCRA functions as a 16-bit transfer counter. ETCRA is decremented by 1 each time a transfer is
performed, and transfer ends when the count reaches H'0000. ETCRB is not used at this time.
ETCRB
ETCRB is not used in normal mode.
(2) Block Transfer Mode
ETCRA
ETCRB
In block transfer mode, ETCRAL functions as an 8-bit block size counter and ETCRAH holds the block size. ETCRAL is
decremented each time a 1-byte or 1-word transfer is performed, and when the count reaches H'00, ETCRAL is loaded
with the value in ETCRAH. So by setting the block size in ETCRAH and ETCRAL, it is possible to repeatedly transfer
blocks consisting of any desired number of bytes or words.
ETCRB functions in block transfer mode, as a 16-bit block transfer counter. ETCRB is decremented by 1 each time a
block is transferred, and transfer ends when the count reaches H'0000.
Rev.6.00 Oct.28.2004 page 182 of 1016
REJ09B0138-0600H
Transfer Counter
Bit
ETCR
Initial value :
R/W
Holds block size
Bit
ETCRAH
Initial value :
R/W
Block size counter
Bit
ETCRAL
Initial value :
R/W
Block Transfer Counter
Bit
ETCRB
Initial value :
R/W
:
:
: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
:
:
:
:
:
:
:
:
: R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W R/W
15
15
*
*
R/W
R/W
15
*
7
*
14
14
*
*
13
13
*
*
R/W
R/W
14
*
6
*
12
12
*
*
11
11
*
*
R/W
R/W
13
*
5
*
10
10
*
*
9
*
9
*
R/W
R/W
12
*
4
*
8
*
8
*
7
*
7
*
R/W
R/W
11
*
3
*
6
*
6
*
5
*
5
*
R/W
R/W
10
*
2
*
4
*
4
*
3
*
3
*
R/W
R/W
9
*
1
*
2
*
2
*
1
*
1
*
R/W
R/W
8
*
0
*
0
*
0
*
*: Undefined
*: Undefined