45111 Datasheet, PDF (160/184 Pages) List of Unclassifed Manufacturers – 14-DAY MONEY BACK GUARANTEE

15 Appendix E: SX Data Sheet
15.2.11 Indirect Addressing
To access any register via indirect addressing, simply move the 8-bit address of the register you wish to
access into the FSR and use IND ($00) as the operand.
Figure 28- SX20/28 Indirect register addressing
fr (5-bit address in instruction)
4
3
2
1
0
Must be = $00
$00
$01 - $FF
7
6
5
Bank Selection Bits
FSR ($04)
4
3
2
1
0
I=1*
Register Address
$00-
$01-
$02-
Global
IND
RTCC
PC
$0F- $0F
Bank 0 Bank 1 Bank 2
Bank 7
$10- $0
$0
$0
$0
$11- $1
$1
$1
———
$1
$12- $2
$2
$2
$2
—
—
$1F- $F
$F
$F
$F
* FSR.4 must be 1 to access banked general purpose RAM, set FSR.4 = 0 for global RAM.
Page 160 • SX-Key/Blitz Development System Manual 2.0 • Parallax, Inc.