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GL640 Datasheet(PDF) 15 Page - List of Unclassifed Manufacturers

Part # GL640
Description  IEEE-1284 to USB Bridge
PDF  39 Pages
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Manufacturer  ETC [List of Unclassifed Manufacturers]
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GL640 Datasheet(HTML) 15 Page - List of Unclassifed Manufacturers

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Revision 1.1
Jun. 7, 1999
-14-
GL640USB, GL640USB-A
PCHBU
F2
PCHBU
F1
PCHBU
F0
Write buffer for upper 3-bit of Program Counter. The upper byte of Program Counter is not
directly accessible. PCHBUF is a holding register for the PC[10:8] whose contents are transferred
to the upper byte of the Program Counter.
Value on POR: “- - - - - 0 0 0”
INTEN (Address 0Bh/8Bh, Interrupt enable register)
R/W
R/W
R/W
GIE
TMROE
N
TMROF
GIE: Global interrupt enable bit
1: Enable all interrupts
0: Disable all interrupts
TMROEN: Timer overflow interrupt enable bit
1: Enable timer interrupt
0: Disable timer interrupt
TMROF: Timer overflow interrupt flag bit
1: Timer register has overflowed
0: Timer register did not overflow
Value on POR: “0 - 0 - - 0 - -“
PSCON (Address 81h, Prescaler control register)
R/W
R/W
R/W
R/W
PSDIS
PS2
PS1
PS0
PSEN: Prescaler disable bit
1: Disable prescaler for timer
0: Enable prescaler for timer
PS[2:0]: Prescaler rate select bits
Bit Value
Timer Rate
000
1:2
001
1:4



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