User`s guide

Elan Digital Systems Ltd. 30 AD125 USER’S GUIDE
The following table shows the indexes of the various registers in the
AD125 (all are 8-bits unless stated):
IR DR write DR read
0 SETUP REG 1 (8-BIT) SETUP REG 1 (8-BIT)
1 SETUP REG 2 SETUP REG 2
2 IODATA IODATA
3 IODIR (4-BIT) IODIR(6-BIT)
4 DIVLO ADDRCTLO
5 DIVHI (6-BIT) ADDRCTHI
6 MUXSEQ N/U
7 TRIGTHRESH N/U
8 N/U SETUP REG 1 (8-BIT)
9 CTLEN SETUP REG 2
A N/U IODATA
B N/U IODIR(6-BIT)
C N/U ADDRCTLO
D DECR ADDRCTHI
E DECW N/U
F CLRCT N/U
Port Index Allocations in the AD125
NOTE
1. All signals with an ‘n’ prefix are active low in this document.
2. All BINARY values are shown with MSBit LEFTMOST.