45111 Datasheet, PDF (158/184 Pages) List of Unclassifed Manufacturers – 14-DAY MONEY BACK GUARANTEE

15 Appendix E: SX Data Sheet
Figure 27 - SX48/52 General-Purpose Register addressing (direct)
fr (5-bit address in instruction)
4
3
2
1
0
=1
Register Selection Bits
$10 - $1F
$00 - $F0
FSR ($04)
7
6
5
4
3
2
1
0
Bank Selection Bits
Ignored because fr.4 is 1
$00-
$01-
$02-
Global
IND
RTCC
PC
$0F- $0F
$10-
$11-
$12-
Bank 0
$0
$1
$2
Bank 1
$0
$1
$2
—
Bank 2
$0
$1
$2
—
$1F- $F
$F
$F
Bank 15
$0
———
$1
$2
$F
To ensure you are writing to the desired register you must first write the correct value to the FSR to
select the proper bank. Table 31 – Bank Addresses and FSR Values and the code fragments will show
you how to directly access the banked registers on the SX20/28 and SX48/52.
Page 158 • SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc.