Filter
Top Products
Registers S16A User’s Guide
36 EDT, Inc. October, 1996
Write to a Trim Register
The trim registers are written by sending a four-byte sequence beginning with D or w.
Dnmm Write an 8-bit value to a trim register.
n Number of the trim register to be written:
2 Output 0 offset
3 Output 1 offset
4 Input 0 gain trim
5 Input 0 offset
6 Input 1 gain trim
7 Input 1 offset
mm Hexadecimal value to write to the register.
The UART responds with the four-character sequence return linefeed > space.
Read the Temperature Register
The Temperature register is read by sending a one-byte command: T or t.
T Read the Temperature register.
The UART responds with the seven-character sequence xxx return linefeed > space, where xxx is the three-
character hexadecimal value. See Temperature Register beginning on page 34 for details on how to
interpret this value.
UART Command/Status Register
The UART CSR is an 8-bit register at 0400C0x. This register controls the serial byte-stream protocol used to
configure and control the internal analog input module.
Bit S16A_ Description
7 UART_INT A read-only status bit. A value of 1 indicates the S16A UART is asserting
an SBus interrupt.
6 Unused. 0 when read.
5 UART_TXBSY A read-only status bit. A value of 1 indicates the S16A UART is currently
transmitting a command byte to the analog input module. No other bytes
can be sent until this bit is clear.
4 UART_RXRDY A read-only status bit. A value of 1 indicates the S16A UART has received
a status byte from the analog input module. Valid status bytes can only be
read from the UART_DATA register when this bit is set.
3 UART_TXINT A value of 1 enables the UART transmit complete interrupt.
2 UART_TXINT A value of 1 enables the UART receive complete interrupt.
1–0 Unused. 0 when read.
Table 16. UART Command/Status Register