Справочник Пользователя для Sun Microsystems S16A

Registers

S16A User’s Guide

36

EDT, Inc.  October, 1996

The trim registers are written by sending a four-byte sequence beginning with D or w.

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.

The Temperature register is read by sending a one-byte command: T or 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.

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.

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.