UM-B-041
SmartBond Production Line Tool
User Manual
Revision 4.8
02-Nov-2022
CFR0012
19 of 170
© 2022 Renesas Electronics
5.5.2
Crystal Trimming
●
The XTAL calibration pulse (300 ms or 500 ms) is transported via the PURPLE arrows
(CC):
CPLD TIMER Tg
➔
CPLD S4
➔
DUT RxD (programmed as GPIO).
●
UART-TxD data is transported via the BLUE arrows (BB):
PC
USB
USB HUB
Quad UART
CPLD signal ‘BB’
DUT TxD.
Figure 7: CPLD XTAL Trim Pulse Data Stream
5.5.3
Loopback Operation
Loopback operation is used during the start of the tests. The PLT software uses this feature to
automatically find the numbers of the Virtual COM ports in the Windows PC.
●
The UART loopback data is transported via the GREEN arrows (DD):
PC
➔
USB
➔
USB HUB
➔
Quad UART
➔
CPLD signal ‘DD’ SW1
➔
Quad UART
➔
USB
HUB
➔
USB
➔
PC.
Figure 8: CPLD UART Loopback Data Stream
Note:
The CPLD is also used to switch the UART signals between the QUAD FTDIs and the DUTs.
When the VBAT is switched off and the UART wires are not disconnected,
a ‘rest voltage’ may be
`
Golden
Unit
Quad
UART
Quad
USB
HUB
PC USB
1
3
5
7
9
2
4
6
8
10
g
r
u(x)
T
g
T
r
CPLD
1
2
3
4
PC USB
l(x)
x(x)
VDDIO
Vbat
v(x)
&
Vpp
gnd
DUT Connection Port
1
0
1
0
‘
0
’
0
1
‘
1
’
0
1
u(x)
p(0/1)
t(0...3)
Vbat
DUT-
Tx
Reset
Vpp
Pulse
DUT-
Rx
U
A
R
T-
Tx
U
A
R
T-
R
x
S1
S2
S3
S4
BB
CC
r(xx)
16 * Virtual COM-PORT
1 * Virtual COM-PORT
16 * DUT Interface Sw Connection Ports
`
Golden
Unit
Quad
UART
Quad
USB
HUB
PC USB
1
3
5
7
9
2
4
6
8
10
g
r
u(x)
T
g
T
r
CPLD
1
2
3
4
PC USB
l(x)
x(x)
VDDIO
Vbat
v(x)
&
Vpp
gnd
DUT Connection Port
1
0
1
0
‘
0
’
0
1
‘
1
’
0
1
u(x)
p(0/1)
t(0...3)
Vbat
DUT-
Tx
Reset
Vpp
Pulse
DUT-
Rx
U
A
R
T-
Tx
U
A
R
T-
R
x
S1
S2
S3
S4
DD
r(xx)
16 * Virtual COM-PORT
1 * Virtual COM-PORT
16 * DUT Interface Sw Connection Ports