DF2398F20V Renesas Electronics America, DF2398F20V Datasheet - Page 203

• Manufacturer Part Number: DF2398F20V
• Description: IC H8S/2300 MCU FLASH 128QFP
• Manufacturer: Renesas Electronics America
• Series: H8® H8S/2300r

Specifications of DF2398F20V

• 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: 256KB (256K 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
• For Use With: YR0K42378FC000BA - KIT EVAL FOR H8S/2378
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -

7.2.3
ETCR is a 16-bit readable/writable register that specifies the number of transfers. The setting of this register is different
for sequential mode and idle mode on the one hand, and for repeat mode on the other.
(1) Sequential Mode and Idle Mode
In sequential mode and idle mode, ETCR functions as a 16-bit transfer counter (with a count range of 1 to 65,536). ETCR
is decremented by 1 each time a transfer is performed, and when the count reaches H'0000, the DTE bit in DMABCR is
cleared, and transfer ends.
(2) Repeat Mode
In repeat mode, ETCR functions as transfer counter ETCRL (with a count range of 1 to 256) and transfer number storage
register ETCRH. ETCRL is decremented by 1 each time a transfer is performed, and when the count reaches H'00,
ETCRL is loaded with the value in ETCRH. At this point, MAR is automatically restored to the value it had when the
count was started. The DTE bit in DMABCR is not cleared, and so transfers can be performed repeatedly until the DTE bit
is cleared by the user.
ETCR is not initialized by a reset or in standby mode.
Transfer Counter
Bit
ETCR
Initial value :
R/W
Transfer Number Storage
Bit
ETCRH
Initial value :
R/W
Transfer Counter
Bit
ETCRL
Initial value :
R/W
Execute Transfer Count Register (ETCR)
:
:
: 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
*
R/W
R/W
15
*
7
*
14
*
13
*
R/W
R/W
14
*
6
*
12
*
11
*
R/W
R/W
13
*
5
*
10
*
9
*
R/W
R/W
12
*
4
*
8
*
7
*
R/W
R/W
11
*
3
*
6
*
5
*
R/W
R/W
10
*
2
*
4
*
3
*
R/W
R/W
Rev.6.00 Oct.28.2004 page 173 of 1016
9
*
1
*
2
*
1
*
R/W
R/W
8
*
0
*
0
*
REJ09B0138-0600H
*: Undefined
*: Undefined