Register Of Bit Search Module - Fujitsu MB91260B Series Hardware Manual

CHAPTER 7 REALOS-RELATED HARDWARE
7.5

Register of Bit Search Module

This section describes the configuration and functions of registers used by the bit
search module.
■ 0 Detection Data Register (BSD0)
Address
000003F0
Read/Write → W
Initial value → Undefined XXXXXXXX
0 detection is performed for the written value.
The initial value after reset is undefined. The read value is undefined.
Use a 32-bit length data transfer instruction for data transfer (Do not use 8-bit or 16-bit length data transfer
instruction).
■ 1 Detection Data Register (BSD1)
Address
000003F4
Read/Write → R/W
Initial value → Undefined XXXXXXXX
Use a 32-bit length data transfer instruction for data transfer (Do not use 8-bit or 16-bit length data transfer
instruction).
• Writing
Detect "1" for the written value.
• Reading
Save data of the internal state of the bit search module is read. This register is used to save or restore
the original state when the bit search module is used by, for example, an interrupt handler.
Even though data is written to the 0 detection or change point detection or data register, data can be
saved or restored only by using the 1 detection data register.
The initial value after reset is undefined.
146
31
H
31
H
XXXXXXXX XXXXXXXX
XXXXXXXX XXXXXXXX
0
XXXXXXXX
B
0
XXXXXXXX
B