Overview Of The Bit-Search Module - Fujitsu MB91150 Series Hardware Manual

CHAPTER 18 BIT-SEARCH MODULE

18.1 Overview of the Bit-Search Module

This module searches for 0 or 1, or for changes in bit values in response to data
loaded into the input register, and returns the bit position at which the respective
behavior was detected.
I Block diagram of the bit-search module
Figure 18.1-1 "Block diagram of the bit-search module" shows a block diagram of the bit-search
module.
I Registers of the bit-search module
Figure 18.1-2 "Registers of the bit-search module" shows the bit search module registers.
Address: 000003F0
Address: 000003F4
Address: 000003F8
Address: 000003FC
394
Figure 18.1-1 Block diagram of the bit-search module
D-BUS
Address
decoder
Figure 18.1-2 Registers of the bit-search module
31
BSD0
H
BSD1
H
BSDC
H
BSRR
H
Input latch
Detection
mode
1 detection register
Bit-search circuit
Result of search
0
0 detection data register
1 detection data register
Value change detection data register
Detection result register