E981.03A38HB ELMOS Semiconductor, E981.03A38HB Datasheet - Page 24

• 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 4. UART Service - Host to E981.03
6.12 Save Mode
To enlarge the V
Properties
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•
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7 Data Communication
The general communication between E981.03 and host is realized by using UART services. Furthermore the IC can
be configured via SPI interface.
7.1 UART-Service Host -> UART
Any service sent from host to E981.03 consists of one or more bytes. The first byte is the UART control field which
identifies the type of the requested service. The E981.03 can handle the following service requests:
ELMOS Semiconductor AG reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.
Service Name
U_Reset.request
U_State.request
U_ActivateBusmon
U_AckInformation
U_ProductID.request
U_ActivateBusyMode
U_ResetBusyMode
U_MxRstCnt
U_ActivateCRC
KNX/ EIB TRANSCEIVER
PRODUCTION DATA - JUL 2, 2012
ELMOS Semiconductor AG
KNX/ EIB transmitter is switched off
The SAVE pin is active low
KNX/ EIB receiver, UART host and SPI host
interfaces remain active
V20 is switched off to allow longer VCC active times
VCC
operation time during low bus voltage supply the E981.03 switches some power devices off.
Hex
0x01
0x02
0x05
0x10
...
0x17
0x20
0x21
0x22
0x24
0x25
UART control field
Bin
0000 0001
0000 0010
0000 0101
0001 0nba
0010 0000
0010 0001
0010 0010
0010 0100
0010 0101
Data Sheet
24/51
Remarks / Description
After receiving a U_Reset.
request the IC transits to
its soft reset state.
The IC answers an U_State.
request service by sending
its communication state
using State.response
service.
n: NACK
b: BUSY
a: ADDRESSED
0: inactive
1: active
The service activates the
KNX Busy Mode in the
E981.03
The host shall synchronize
its receiver before sending
the U_ResetBusyMode.
number of busy and nack
counts (in one byte)
- 0..7 times
Only with baud rates
19.200 or 115.200
B2 B1 B0
7 6 5 4 3 2 1 0
Busy
followed by n bytes
QM-No.: 25DS0046E.01
KNX control field
0
0
0 N2 N1 N0
0
E981.03
Nack