%
%
&" #"! !$! #
The firmware prom’s are listed in the PAL part list.
3. 8. 3. 3. Serial Boot Prom
The processor R4700 reads some internal operational settings out of a serial boot prom at
power up. The prom volume is 256 bits. The first 15 bits are valid. The rest is reserved
and have to be clamped to zero.
Serial Bit Meaning
0 Reserved and zero
1 to 4 Block write data mode and ratio
5 to 7 Clock ratio between internal and external
clock
8 Endian ordering
9 to 10 Non–block write handling
11 Enable of timer interrupt
12 Reserved and zero
13 to 14 Output driving slew rate
15 to 255 Reserved and zero
The serial boot prom is listed in the PAL part list. It is named CU09EA00 and labeled
”EA” or ”50MHz”.
3. 9. AQX CU09 CCU History of Modifications
EC
No.
Date Part
Number
Description of Bugs, Changes and ModiĆ
fications
Ser.No. New
EC-
Level
CU09 Prototypes, H3P2160C 2000–
2020
CU09 Prototypes, H3P2160D 2021–
2025
2435 8.10.97 H2570 Introduction of AQX CCU CU09 Layout ver-
sion H3P2160D
2301 50
2455 12.1.98 H2570 Correct Part List to the originally used Clock
driver with CMOS signal level
IDT49FCT805ASO20–2
2331 51
3. 10. AQS CU10 CCU History of Modifications
EC
No.
Date Part
Number
Description of Bugs, Changes and ModiĆ
fications
Ser.No. New
EC-
Level
2482 19.6.98 H9503 Introduction of AQS CCU CU10 Layout ver-
sion H3P2380
0010 00
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