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Elmos Semiconductor AG

Data Sheet

QM-No.: 25DS0046E.03

PRODUCTION DATA - JAN 15, 2015

Elmos Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.

KNX/ EIB TRANSCEIVER

E981.03

Register Name

Address

Description

UART_TX

0x2A4

UART transmitter data register

Register Name

Address

Description

SPI_CTRL

0x205

SPI control register

SPI_STAT

0x310

SPI status register

SPI_PINS

0x206

SPI pin access

Table 55. UART transmitter registers

Table 57. SPI registers

UART_RX

MSB

LSB

content

D7

D6

D5

D4

D3

D2

D1

D0

hard reset value

0

0

0

0

0

0

0

0

soft reset value

-(not reset)

access

UART_TX

MSB

LSB

content

D7

D6

D5

D4

D3

D2

D1

D0

hard reset value

0

0

0

0

0

0

0

0

soft reset value

-(not reset)

access

Table 54. Previous received byte

Table 56. UART transmitter data register

back to Table 8 Register Table

back to Table 8 Register Table

back to Table 8 Register Table

back to Table 8 Register Table

UART Byte Transmitter

TXD idle-level in any other mode but KNX Analog Mode is "1".

The UART transmitter has a baud rate deviation of less than 1% during byte frame transmission. Subsequent

bytes may be transmitted without a break.

SPI_CTRL

MSB

LSB

content

-

-

-

-

-

-

ON1

ON0

hard reset value

0

0

0

0

0

0

1

1

soft reset value

-

-

-

-

-

-

1

1

access

R

R

R

R

R

R

bit description

ON1 :

ON0 :

"-1" or "1-": the SPI is switched on

"00": the SPI is switched off

SPI_STAT

MSB

LSB

content

-

-

-

-

-

-

-

XERR

hard reset value

0

0

0

0

0

0

0

0

soft reset value

- (not reset)

access

R

R

R

R

R

R

R

bit description

XERR : XOR error detected

Table 58. SPI control register

Table 59. SPI status register

1) Access via UART service and SPI possible. In case of hard reset the register is reset to the hard reset value.

1) Access via UART service and SPI possible. In case of hard reset the register is reset to the hard reset value.

1) Access via UART service and SPI possible. In case of hard or soft reset the register is reset to the hard reset value or soft reset

value respectively.

1) Access via UART service and SPI possible. In case of hard reset the register is reset to the hard reset value.