XJ128 and XJ128 Plus Printhead
XJ128 Guide to Operation
Xaar Document no: D031010302 Version A
Page 23
Pin
Signal name
Pin type
Function
1
nSS2
Input
Chip select for MOSI/MISO
–
chip 2
2
GNDH
Supply
High voltage ground
3
VPPH
Supply
35V high current voltage supply
4
VPPL
Supply
35V low current, low noise voltage supply
5
GNDL
Supply
High voltage, low noise ground
6
nFAULT
Output
High temp error signal
7
nRESET
Input
Driver chip logic reset
8
MOSI
*
Input
Serial data input select
9
TEST_0
Input
Not connected
10
TEST_1
Input
Not connected
11
TEST_2
Input
Not connected
12
TEST_3
Input
Not connected
13
TEST_4
Input
Not connected
14
TEST_5
Input
Not connected
15
TEST_6
Input
Not connected
16
GND
Supply
5V logic ground
17
VDD
Supply
5V logic supply
18
TEST_10
*
Input
Must be tied to VDD
19
SCK
Input
Main sample clock
–
‘
data strobe
’
20
nSS1
Input
Chip select for MOSI/MISO
–
chip 1
21
TEST_7
Input
Not connected
22
TEST_8
Input
Not connected
23
TEST_9
Input
Not connected
24
READY
Output
‘
Printhead ready
’
used for signal timing
25
PHO
Input
Phase order select
26
nFIRE
Input
Printhead
‘
fire
’
trigger signal
27
MISO
Output
Serial data output select
28
CLK
Input
State machine clock
–
‘
sample clock
’
29
VPPH
Supply
35V high current voltage supply
30
GNDH
Supply
High voltage ground
Table 5.1
–
Pin out of electrical connector
5.2 Signal level definition
Low Level represents a logic
“
0
”
This is achieved holding the signal to logic ground (GND).
High Level represents a logic
“
1
”
This is achieved holding the signal to logic power supply voltage (VDD).
*
Pull-down resistor inside printheads: 2-30k