45300 Parallax Inc, 45300 Datasheet - Page 161
![BOARD PROTO SX48](/photos/9/25/92507/mfg_45300_sml.jpg)
45300
Manufacturer Part Number
45300
Description
BOARD PROTO SX48
Manufacturer
Parallax Inc
Type
MCUr
Specifications of 45300
Contents
Board
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
For Use With/related Products
SX48
For Use With
130-28029 - KIT PARTS SMART SENSORS45111 - MANUAL FOR SX-KEY/BLITZ VER. 2.028850 - CARRIER BOARD BOARD OF EDU USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant, Contains lead / RoHS non-compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
453001
Manufacturer:
LITTELFUSE/力特
Quantity:
20 000
Company:
Part Number:
453002
Manufacturer:
LITTELFU
Quantity:
1 000
- Current page: 161 of 184
- Download datasheet (2Mb)
This example for the SX20/28 will clear every General Purpose RAM register on every bank using
indirect addressing.
15.2.12 The Bank Instruction
Often it is desirable to set the bank select bits of the FSR with one instruction cycle (the MOV FSR,
#literal commands above take two cycles). The SX instruction set offers such an instruction called Bank.
The Bank instruction sets the upper bits of the FSR to point to the RAM bank required. Note: On the
SX48/52, the BANK instruction only selects one of 8 banks in either the lower 8 or upper 8 banks. FSR.7 selects
the lower or upper group of 8 banks. To select a bank, use MOV FSR, #literal or add an SETB FSR.7 instruction
after the BANK instruction. Here’s an example of how to use the Bank instruction on the SX20/28:
Init
Loop
$00-
$01-
$02-
$0F-
4
fr (5-bit address in instruction)
mov FSR, #$10
clr
inc
setb FSR.4
cjne FSR, #$10, Loop ; Repeat until all registers
Global
RTCC
IND
$0F
PC
3
Figure 29 - SX48/52 Indirect register addressing
Must be = $00
IND
FSR
2
7
$10-
$11-
$12-
$1F-
Bank Selection Bits
1
6
Bank 0
$0
$1
$2
$F
; FSR = addr of 1
; Clear register
; Point to next register
; Keep us on G.P. RAM area
; have been cleared
SX-Key/Blitz Development System Manual 2.0 Parallax, Inc. Page 161
0
5
Bank 1
$0
$1
$2
$F
—
—
15 Appendix E: SX Data Sheet
FSR ($04)
4
Bank 2
$F
$0
$1
$2
st
3
$00
RAM Reg.
$01 - $FF
Register Address
———
2
Bank 15
1
$0
$1
$2
$F
0
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