TMS320F datasheet(144/389 Pages) TI

144 / 389 page

BIT

Test Bit

7-44

Syntax

BIT

dma, bit code

Direct addressing

BIT

ind, bit code [, ARn]

Indirect addressing

Operands

dma:

7 LSBs of the data-memory address

bit code:

Value from 0 to 15 indicating which bit to test (see Figure 7–1)

Value from 0 to 7 designating the next auxiliary register

ind:

Select one of the following seven options:

*–

*0+

*0–

*BR0+

*BR0–

BIT

dma, bit code

987

6543

210

bit code

dma

BIT

ind, bit code [ ,ARn ]

987

6543

210

bit code

ARU

NAR

Note:

ARU, N, and NAR are defined in section 6.3,

Indirect Addressing Mode (page 6-9).

Execution

Increment PC, then ...

(data bit number (15 – bit code))

→ TC

Status Bits

Affects

Description

The BIT instruction copies the specified bit of the data-memory value to the TC

bit of status register ST1. Note that the BITT, CMPR, LST #1, and NORM

instructions also affect the TC bit in ST1. A bit code value is specified that

corresponds to a certain bit number of the data-memory value, as shown in

Figure 7–1. For example, if you want to copy bit 6, you specify the bit code as

9, which is 15 minus six (15–6).

Figure 7–1. Bit Numbers and Their Corresponding Bit Codes for BIT Instruction

Bit code

2345

6789

Bit number

9876

5432

MSB

Data-memory value

LSB

Words

Opcode

TMS320F Datasheet(PDF) 144 Page - Texas Instruments

TMS320F Datasheet(HTML) 144 Page - Texas Instruments

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