Fluke PM6690 - Page 89

Troubleshooting 6-45
JTAG
RESET
+1.8 V
+3.3 VD
X33
11.2896 MHz
mP
B7
FLASH
SDRAM
SDRAM
ADDRESS
CONTROL
U116/U55
U13
DISPLAY PCB
FPGA
DATA LCD BUS
LCD
VOLT
U17
U15
U16
U4
U1
U2
LCD
I/O
U3
KEYBOARD
U11
TEMP
U39
IC
2
I/O
U40
INT
INT
RELAYS ETC.
mPCLK
mPCLK
LOAD
FPGA
CLK
X29
+3.3 VD
(+1.8 V internal)
+3.3 VD
+1.8 V
+3.3 VD
+3.3 VD
+3.3 VD
22
16
16
16
32
DIN
X55
X31
Startup Monitor
DONE
INITN
PROGN
X65
BUFFER
5
32
32
BUFFER
U16
U5
2
U53/U54
Figure 6-73 Microprocessor, memories - startup.