HD6433044 Hitachi Semiconductor, HD6433044 Datasheet - Page 211

• Manufacturer Part Number: HD6433044
• Description: (HD64 Series) Hitachi Single-Chip Microcomputer
• Manufacturer: Hitachi Semiconductor

8.3.3 Execute Transfer Count Registers (ETCR)
An execute transfer count register (ETCR) is a 16-bit readable/writable register that specifies the
number of transfers to be executed. The functions of these registers differ between normal mode
and block transfer mode.
•
ETCRA
ETCRB: Is not used in normal mode.
In normal mode ETCRA functions as a 16-bit transfer counter. The count is decremented by 1
each time one transfer is executed. The transfer ends when the count reaches H'0000. ETCRB is
not used.
Bit
Initial value
Read/Write
Normal mode
R/W
15
R/W
14
R/W
13
R/W
12
R/W
11
R/W
10
R/W
197
Transfer counter
9
Undetermined
R/W
8
R/W
7
R/W
6
R/W
5
R/W
4
R/W
3
R/W
2
R/W
1
R/W
0