UT1553RTMP 查看數據表（PDF） - Aeroflex UTMC

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UT1553RTMP

Remote Terminal Multi-Protocol

Aeroflex UTMC 

3.5 Base Pointer Data Register

The BPD provides three types of information: (1) the location in memory for the 64-word Pointer Block; (2) the receive-data

storage-buffer select for either single or separate data buffers; and (3) the size or depth of the single or separate data buffers

(figure 8). (0000H after Master Reset.)

BPD Bit Definitions

Bit 15-

BPA15-BPA 6 Block Pointer Address. These ten bits provide the RTMP with the Bit 6 ten most significant address

lines for the location, within the 64K word addressing range, of the 64-word Pointer Block.

Bit 5

N/A

This bit is not used.

Bit 4

BUFSL

Buffer Select. When BUFSL = 1, the host selects the RTMP’s single buffer mode of storing 1553

receive data. If BUFSL = 0, the host selects the separate buffer mode of storing 1553 receive data.

Bit 3-

BSIZ3-BSIZ0

Buffer Size Select. These four bits select the size of the receive data Bit 0 buffers and can range

from 3 (0011B) to 15 (1111B). The actual size of the data buffer is equal to 2x where X is the

decimal equivalent of BSIZ3-BSIZ0. The size of the data buffers can range from eight (23 ) words

to 32K (21 5) words. The variable X is not defined for zero through two.

15 14

B

B

P

P

A

A

1

1

5

4

MSB

13 12 11 10 9

8

76

5

4

BB B

BB

BBBN

B

P

PP

P

P

P

P

P

/

U

AA A

AA

AAAA

F

11

1

1

9

8

76

S

32

1

0

L

Figure 8. The Base Pointer Data Register

3

2

BB

SS

I

I

ZZ

32

1

0

BB

S

S

I

I

Z

Z

1

0

LSB

3.6 Read Only Registers

The RTMP has two internal registers that are read-only. These two registers provide status information on the operation of the

RTMP:

• The Operational Status Register

• The Last 1553 Command Register

RTMP-15

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