IC-JX_16 Datasheet, PDF (39/48 Pages) IC-Haus GmbH – 16-FOLD 24 V HIGH-SIDE DRIVER

iC-JX
16-FOLD 24 V HIGH-SIDE DRIVER WITH µC INTERFACE
I/O INTERFACES
Rev C2, Page 39/48
Interfaces
iC-JX can be operated with either a serial (SPI) or
parallel interface. This is set using pin NSP. When this
pin is connected to VDD the device works in parallel
mode. With NSP connected to ground iC-JX operates
in serial mode.
Interface selection
Pin NSP selected interface
0
SPI
1
parallel
Table 17: Selection of interface with pin NSP
Parallel interface
The parallel interface in iC-JX consists of:
• 8 data lines: D7 . . . D0
• 5 address lines: A4 . . . A0
• 3 control lines: NCS, NRD, NWR
A circuit diagram of the parallel microcontroller interface
is given in Figure 12.
Parallel interface: reading and writing data
The address lines A4 . . . A0 are used to select the reg-
isters in iC-JX. Address and data is accepted with the
falling edge of chip select signal NCS. Control lines
NRD and NWR govern read and write access
5V
NWR
NRD
A(7:0)
µC
D(7:0)
INT
NRES
5V
C2
100nF
5V
C1
100nF
5V
ADDRESS
DECODER
0
1
2
3
4
0
1
2
3
4
5
6
7
NSP
NCS
NWR
NRD
A0
A1
A2
A3
A4
D0
D1
D2
D3
D4
D5
D6
D7
VDD POE VCC
VB1
Nibble 0
IO1
IO2
IO3
IO4
VB2
Nibble 1
IO5
IO6
IO7
IO8
VB3
Nibble 2
IO9
I010
I011
I012
Nibble 3
VB4
IO13
IO14
IO15
IO16
5V
RESET
CONTROLLER
NINT
NRES
CONTROL
REGISTER
A/D
CONVERTER
iC-JX
MQFP52
RSET VREF BLFQ CLK
GNDD GNDA
optional
5V
1.25MHz
2.5V
5V
10 Hz
24V
24V
24V
S1
S2
S3
S4
S5
R1
S6
S7
S8 R2
R3
R5
S9 R4
R7
S10 R6
R9
S11 R8
R10
S12
LA1
LA2
REL1
REL2
Figure 12: Example application using a parallel interface (pin NSP=1)