Fluke PM6690 - Page 67

Troubleshooting 6-23
6MHz
B4
40 MHz
B5
GPIB
U37
U34
USB
mP
CONTROL*
DATA
ADDRESS
FPGA
+3.3 VD
INT
+5 VD
INT
U38
+5 VD
+3.3 VD
8
8
3
3
16
16
16
6
3
5
5
5
5
32
INT
U11
X20
INT
U13
MEASUREMENT CONTROL**
MEASUREMENT DATA
FIFOCLK
FIFOALERT
EMPTY
RESFPGA
FIFOWR
**
CSUSB
CSFPGA
CSGPIB
DIRGPIB
WR
RD
*
Figure 6-34 Microprocessor bus and interfaces.