Fujitsu FR20 Manual De Usuario
269
19.2
Register of Bit Search Module
The register configuration/functions of bit search module is shown.
■
0 Detection Data Register (BSD0)
Figure 19.2-1 0 detection data register (BSD0)
•
The module detects 0 for the value written to this register.
•
The initial value by reset is irregular.
•
The read value is indeterminate.
•
Use 32-bit length data transfer command for data transfer (do not use 8-bit and 16-bit length data
transfer commands).
■
1 Detection Data Register (BSD1)
Figure 19.2-2 1 detection data register (BSD1)
•
Use 32-bit length data transfer command for data transfer (do not use 8-bit and 16-bit length data
transfer commands).
•
Write
The module detects 1 for the value written to this register.
•
Read
Saved data in the internal status of the bit search module is read. If the bit search module is used by the
interrupt handler, etc., it is used when the original status is saved/returned. In case of 0 detection, change
point detection, or even when data is written to the data register, save/return is possible by operating
only data register for 1 detection.
•
The initial value by reset is irregular.
■
Change Point Detection Data Register (BSDC)
Figure 19.2-3 Change point detection data register (BSDC)
•
The module detects a change point for the value written to this register.
•
The initial value by reset is irregular.
•
The read value is indeterminate.
•
Use 32-bit length data transfer command for data transfer (do not use 8-bit and 16-bit length data
transfer commands).
0
XXXX XXXX
B
Initial value
bit
Address: 000003F0
H
W
31
16 15
Access
0
XXXX XXXX
B
Initial value
bit
R/W
31
16 15
Address: 000003F4
H
Access
0
XXXX XXXX
B
Initial value
bit
W
31
16 15
Address: 000003F8
H
Access