aduc7033bstz-8l-rl Analog Devices, Inc., aduc7033bstz-8l-rl Datasheet - Page 115
aduc7033bstz-8l-rl
Manufacturer Part Number
aduc7033bstz-8l-rl
Description
Integrated Precision Battery Sensor For Automotive
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADUC7033BSTZ-8L-RL.pdf
(136 pages)
- Current page: 115 of 136
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SERIAL TEST INTERFACE
The ADuC7033 incorporates single pin, serial test interface
(STI) ports that can be used for end-customer evaluation or
diagnostics on finished production units.
The STI port transmits from one byte to six bytes of data in 12-bit
packets. As shown in Figure 41, each transmission packet
includes a start bit, the transmitted byte (eight bits), an even
parity bit, and two stop bits. The STI data is transmitted on the
STI pin and the baud rate is determined by the overflow rate of
Timer4.
The STI port is configured and controlled via six MMRs.
STIKEY0:
STIKEY1:
STIDAT0:
STIDAT1:
STIDAT2:
STICON:
Serial Test Interface Key 0 Register
Name:
Address:
Access:
Function:
STIKEY0
0xFFFF0880
Write only
The STIKEY0 MMR is used in conjunction with
the STIKEY1 MMR to protect the STICON MMR.
STIKEY0 must be written with 0x0007 immediately
before any attempt is made to write to STICON.
STIKEY1 must be written with 0x00B9 immediately
after STICON is written to ensure the STICON write
sequence is completed successfully. If STIKEY0 is not
written, is written out of sequence, or is written incor-
rectly, any subsequent write to the STICON MMR
is ignored.
Serial Test Interface Key 0
Serial Test Interface Key 1
Data0 (16-bit) holds 2 bytes
Data1 (16-bit) holds 2 bytes
Data2 (16-bit) holds 2 bytes
Controls the serial test interface
Figure 41. Serial ADC Test Interface Example, Three-Byte Transmission
PARITY BIT
STI BYTE0
Rev. 0 | Page 115 of 136
START BIT
STI BYTE1
Serial Test Interface Key 1 Register
Name:
Address:
Access:
Function:
Serial Test Interface Data 0 Register
Name:
Address:
Default
Value:
Access:
Function:
Serial Test Interface Data 1 Register
Name:
Address:
Default
Value:
Access:
Function:
PAIRTY BIT
WITH 2 STOP BITS
STI BYTE2
STIKEY1
0xFFFF0888
Write only
The STIKEY1 MMR is used in conjunction with
the STIKEY0 MMR to protect the STICON MMR.
STIKEY1 must be written with 0x00B9 immediately
after any attempt is made to write to STICON.
STIKEY0 must be written with 0x0007 immediately
before STICON is written to ensure the STICON
write sequence is completed successfully. If STIKEY1
is not written, is written out of sequence, or is
written incorrectly, any previous write to the
STICON MMR is ignored.
STIDAT0
0xFFFF088C
0x0000
Read/write
The STIDAT0 MMR is a 16-bit register that holds
the first and second data bytes that are to be trans-
mitted on the STI pin as soon as the STI port is
enabled. The first byte to be transmitted occupies
Bits[7:0] and the second byte occupies Bits[15:8].
STIDAT1
0xFFFF0890
0x0000
Read/write
The STIDAT1 MMR is a 16-bit register that holds
the third and fourth data bytes that are to be
transmitted on the STI pin when the STI port is
enabled. The third byte to be transmitted occupies
Bits[7:0] and the fourth byte occupies Bits[15:8].
ADuC7033
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