hi-3587 Holt Integrated Circuits, Inc., hi-3587 Datasheet - Page 3

• Manufacturer Part Number: hi-3587
• Description: Transmitter With Spi Interface
• Manufacturer: Holt Integrated Circuits, Inc.

INSTRUCTIONS
Instruction op codes are used to read, write and configure the HI-
3587. When
an instruction op code into the decoder, starting with the first
rising SCK edge. The op code is fed into the SI pin, most
significant bit first.
For write instructions, the most significant bit of the data word
must immediately follow the instruction op code and is clocked
into its register on the next rising SCK edge. Data word length
varies depending on word type written: 16-bit writes to Control
Register or 32-bit ARINC word writes to transmit FIFO.
For read instructions, the most significant bit of the requested
data word appears at the SO pin after the last op code bit is
clocked into the decoder, at the next falling SCK edge. As in
write instructions, read instruction data field bit-length varies with
read instruction type.
Note 1: This instruction is reserved for factory test only. If executed, up to 1,024 data bits may be output from the SO pin.
OP CODE
Hex
0A
0B
0C
0D
0E
00
01
02
03
04
05
06
07
08
09
0F
10
12
11
CS
goes low, the next 8 clocks at the SCK pin shift
DATA FIELD
N x 32 Bits
[Note 1]
[Note 1]
[Note 1]
16 bits
16 bits
None
None
None
None
None
None
None
8 bits
8 bits
8 bits
None
None
None
No instruction implemented
After the 8th op-code bit is received, perform Master Reset (MR)
No instruction implemented
No instruction implemented
No instruction implemented
No instruction implemented
No instruction implemented
Programs a division of the ACLK input. If the divided ACLK frequency is 1 MHz and Control
Register bit CR1 is set, the ARINC transmitter operates from the divided ACLK clock. Allowable
values for division rate are X1, X2, X4, X8, or XA hex. Any other programmed value results in no
clock. Note: ACLK input frequency and division ratio must result in 1 MHz clock."
Reserved [Note 1]
Reserved [Note 1]
Read the Status Register
Read the Control Register
Read the ACLK divide value programmed previously using op code 07 hex
Reserved [Note 1]
Write up to 32 words into the next empty position of the Transmitter FIFO
No instruction implemented
Write the Control Register
Reset the Transmitter FIFO.
Transmission enabled by this instruction only if Control Register bit 13 is zero
TABLE 1. DEFINED INSTRUCTION OP CODES
HOLT INTEGRATED CIRCUITS
HI-3587
3
After the 8th op-code bit is received
Table 1 lists all instructions. Instructions that perform a reset or
set, or enable transmission are executed after the last SI bit is
received while
Example:
CS
SCK
SI
DESCRIPTION
MSB
CS
op code 07hex
is still low.
one SPI Instruction
LSB MSB
, the Xmit FIFO will be empty
data field 02hex
LSB