21 in input from port into word – Texas Instruments MSP50C6xx User Manual
Page 191
Individual Instruction Descriptions
4-105
Assembly Language Instructions
4.14.21
IN
Input From Port Into Word
Syntax
[label]
name
dest, src1
Clock, clk
Word, w
With RPT, clk
Class
IN
{adrs}, port4
Table 4–46
Table 4–46
6a
IN
An[~], port6
1
1
n
R
+3
6b
Execution
dest
⇐
content of port6 or port4
PC
⇐
PC + w
Flags Affected
dest is An:
OF, SF, ZF, CF are set accordingly
dest is {adrs}
XZF, XSF are set accordingly
Opcode
Instructions
16
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
IN {adrs}, port4
1
1
0
0
0
port4
adrs
x
dma16 (for direct) or offset16 (long relative) [see section 4.13]
IN An[~], port6
1
1
1
0
1
1
0
An
port6
~A
Description
Input from I/O port. Words can be input to memory from one of 16 port
addresses or one of 48 port addresses. The port4 address is multiplied by 4
to get the actual port address.
See Also
INS, OUT, OUTS
Example 4.14.21.1
IN *R0, 0x0c
Input data from port address 0x0c * 4 = 0x30 to data memory location pointed by R0.
Example 4.14.21.2
IN A2~, 0x3d
Input data from port address 0x3d to accumulator A2~.