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HP 15C and INT(1/√(1-x),0,1)
01-17-2018, 05:06 AM
Post: #44
RE: HP 15C and INT(1/√(1-x),0,1)
From the HP-41C service manual, page 2-1:
Code:
The nominal oscillator frequency of 1440 kHz is reduced by 
a factor of 4 to produce a system operating frequency between 
343 and 378 kHz

And from the 1LF5-0301/1LF5-002 CPU detailed description, page 3-4:
Code:
The 1LE3 CPU is designed for 41C and 11C, 12C calculator. 
At wafer and package level,  their part numbers are designated as follows:
Wafer: 1LF5-01 (11C, 12C) 1LF5-03 (41C)
Package: 1LF5-0301 (11C, 12C) 1LF5-002 (41C)
The difference between the two parts are programmed at metal mask [...] 
The operating range of the two chips are also different and are 
summarized as follow:
41C Clock frequency range: 340 to 380 kHz 
11C, 12C Clock frequency range: 200 to 230 kHz

Both documents are available on TOS.
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Messages In This Thread
HP 15C and INT(1/√(1-x),0,1) - salvomic - 11-26-2017, 07:51 PM
RE: HP 15C and INT(1/√(1-x),0,1) - JimP - 01-12-2018, 04:18 AM
RE: HP 15C and INT(1/√(1-x),0,1) - tgray - 01-09-2018, 03:42 PM
RE: HP 15C and INT(1/√(1-x),0,1) - Didier Lachieze - 01-17-2018 05:06 AM



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