IC-MB4_15 Datasheet, PDF (22/40 Pages) IC-Haus GmbH – BiSS INTERFACE MASTER

iC-MB4
BiSS INTERFACE MASTER
MICROCONTROLLER INTERFACE
preliminary
Rev B2, Page 22/40
With pin CFGSPI the microcontroller interface is se-
lected between an 8 bit parallel interface or an SPI
serial interface. With pin CFGSPI = 0 the 8 bit parallel
microcontroller interface is selected in which the bidirec-
tional data bus alternately transmits addresses and data
in blocks of 8 bits (see figures 3). With pin INT_NMOT =
0 for an Intel 8051 controller or INT_NMOT = 1 for a
68HC11 Motorola controller communication type is se-
lected.
CFGSPI
0
0
INT_NMOT
0
1
Mode
Motorola 68HC11
Intel 8051
Table 11: Parallel communication modes
CFGSPI
1
INT_NMOT
-
Mode
SPI1 (polarity = 0,
phase = 0)
Table 12: SPI communication modes
When operated in conjunction with an SPI controller,
pin ALE is used as a clock input (SCK) and pin NCS
as an enable input (NCS), with DB0 as the data input
(SI) and DB1 as the data output (SO). Data is transmit-
ted serially in successive blocks of 8 bits (command,
address and data). Six commands are available:
• WriteData (0x02 = 0b0000 0010)
• ReadData (0x03 = 0b0000 0011)
• ReadStatus (0x05 = 0b0000 0101)
SPI Serial Microcontroller Interface
With pin CFGSPI = 1 the SPI serial microcontroller in-
terface is selected.
• WriteInstruction (0x07 = 0b0000 0111)
• ReadData0 (0x09 = 0b0000 1001)
• WriteData0 (0x0B = 0b0000 1011)
Figure 16: SPI transmission protocol (polarity 0, phase 0)