DP8344 datasheet(149/184 Pages) NSC

149 / 184 page

60 Reference Section (Continued)

OR Immediate

Syntax

n rsd

immediate limited register

Affected Flags

N Z

Description

Logically ORs the immediate value n to the register rsd and

places the result back into the register rsd Note that only

the active registers R0 – R15 may be specified for rsd The

value of n is 8 bits wide

Example

Mask both the Transmitter and Receiver interrupts via the

Interrupt Control Register ICR

R2 Leave the other inter-

rupts unaffected

EXX

select main reg banks

00000011B ICR

mask transmitter and

receiver interrupts

Instruction Format

0101

Opcode

rsd

T-states

Bus Timing

Figure 6-1

Operation

rsd

xrsd

ORA

OR with Accumulator

Syntax

ORA

Rs Rd

ORA

mIr

Affected Flags

N Z

Description

Logically ORs the source register Rs to the active accumu-

lator and places the result into the destination specified

The destination may be either a register Rd or data memo-

ry via an index register mode

mIr

Note that register bank

selection determines which accumulator is active

Example

Write an 11-bit word to the Transmitter’s FIFO This exam-

ple assumes that the index register IZ points to the location

of the data in memory

TCRsettings

EQU

00101000B

EXX

select main A alt B

MOVE

TCRsettingsA

load accumulator wmask

MOVE

IZa R20

load bits 8 9

ORA

R20TCR

write bits 8 9 10 to TCR

MOVE

IZa RTR

push 11-bit word to FIFO

Instruction Format

ORA

Rs Rd

111101

Opcode

ORA

mIr

TLF9336 – 11

T-states

ORA

Rs Rd

ORA

mIr

Bus Timing

ORA

Rs Rd

Figure 6-1

ORA

mIr

Figure 6-7

Operation

ORA

Rs Rd

accumulator

xRd

ORA

mIr

accumulator

xdata memory

149

DP8344 Datasheet(PDF) 149 Page - National Semiconductor (TI)

DP8344 Datasheet(HTML) 149 Page - National Semiconductor (TI)

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL