E981.03A38HB ELMOS Semiconductor, E981.03A38HB Datasheet - Page 44

• Manufacturer Part Number: E981.03A38HB
• Description: Interface - Specialized KNX/EIB transceiver
• Manufacturer: ELMOS Semiconductor

Specifications of E981.03A38HB

• Rohs: yes
• Product Type: KNX/EIB Transceiver
• Operating Supply Voltage: 3.3 V
• Supply Current: 10 mA
• Maximum Power Dissipation: 1 W
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: QFN-32
• Minimum Operating Temperature: - 25 C

Table 51. UART control register
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
1. The bit ON is doubled for safety reasons.
2. Bits ON1 and ON0 can not be modified using U_WriteReg service request.
3. Bit CRC is used to activate CRC calculation on UART to host communication. CRC is not used in case of KNX
Table 52. UART status register
1) Access via UART service and SPI possible. In case of hard reset the register is reset to the hard reset value.
UART Byte Receiver
The parity bit of every received byte from the host will be checked by the E981.03. Errors will be reported to the
host controller by sending a State.indication service with receiver error flag set to the host as soon as possible.
The UART receiver accepts frames up to a maximum baud rate deviation of 3%. The signals can be transmitted
without a break.
Table 53. UART receiver registers
ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
UART_CTRL
content
hard reset value
soft reset value
access
bit description
UART_STAT
content
hard reset value
soft reset value
access
bit description
Register Name
UART_RX
KNX/ EIB TRANSCEIVER
PRODUCTION DATA - JUL 2, 2012
ELMOS Semiconductor AG
value respectively.
UART interface is switched off only if both ON bits have value "0".
Otherwise UART interface is switched on and the ON bits are set to value "1" by the E981.03 itself.
Use SPI to switch UART on and off.
Bits TXDEL and CRC can be modified using either U_WriteReg service request or SPI.
bus monitor mode or 9.6 k baud UART speed, independent on the value of the CRC bit of register UART_CTRL.
MSB
-
0
-
R
TXDEL:
"1": activate constant transmission delay between end of UART service and start of trans-
mission on KNX bus
"0": transmission delay between end of UART service and start of transmission on EIB bus
is variable (faster)
CRC:
"1": the UART CRC is enabled (not available in analog mode and not at 9.6kBd)
"0": the UART CRC is disabled
ON1 :
ON0 :
"-1" or "1-": the UART is switched on
"00": the UART is switched off
MSB
-
0
R
ON :
"1": the UART interface is currently on
"0": the UART interface is currently off. This may be because of Analog Mode activation or
because of a host write access to the UART_CTRL register
Address
0x2A3
-
0
-
R
-
0
R
Description
previous received byte
-
0
-
R
-
0
R
Data Sheet
44/51
TXDEL
0
0
R/W
-
0
R
- (not reset)
1)
CRC
0
0
R/W
-
0
R
1)
-
0
-
R
-
0
R
back to
back to
QM-No.: 25DS0046E.01
ON1
1
1
R/W
-
0
R
Table 8 Register Table
Table 8 Register Table
1)
E981.03
LSB
ON0
1
1
R/W
LSB
ON
0
R
1)
1)