HD6413003RVF RENESAS [Renesas Technology Corp], HD6413003RVF Datasheet - Page 207

• Manufacturer Part Number: HD6413003RVF
• Description: microcontroller (MCU)
• Manufacturer: RENESAS [Renesas Technology Corp]

•
ETCRA
ETCRB
In block transfer mode, ETCRAH functions as an 8-bit block size counter. ETCRAL holds the
initial block size. ETCRAH is decremented by 1 each time one byte or word is transferred. When
the count reaches H'00, ETCRAH is reloaded from ETCRAL. Blocks consisting of an arbitrary
number of bytes or words can be transferred repeatedly by setting the same initial block size value
in ETCRAH and ETCRAL.
In block transfer mode ETCRB functions as a 16-bit block transfer counter. ETCRB is
decremented by 1 each time one block is transferred. The transfer ends when the count reaches
H'0000.
The ETCRs are not initialized by a reset or in standby mode.
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Bit
Initial value
Read/Write
Block mode
R/W
15
R/W
R/W
7
7
R/W
14
R/W
13
R/W
R/W
6
6
R/W
12
R/W
11
R/W
R/W
5
5
R/W
10
Block transfer counter
R/W
189
Block size counter
9
Initial block size
Undetermined
R/W
Undetermined
R/W
Undetermined
4
4
ETCRAH
R/W
ETCRAL
8
R/W
7
R/W
R/W
3
3
R/W
6
R/W
5
R/W
R/W
2
2
R/W
4
R/W
3
R/W
R/W
1
1
R/W
2
R/W
1
R/W
R/W
0
0
R/W
0