USBN9603-28M National Semiconductor, USBN9603-28M Datasheet - Page 31

• Manufacturer Part Number: USBN9603-28M
• Description: USB Controller IC
• Manufacturer: National Semiconductor

Specifications of USBN9603-28M

• Interface: USB
• No. Of Pins: 28
• Peak Reflow Compatible (260 C): No
• Supply Voltage Max: 7V
• Leaded Process Compatible: No
• Controller Type, Ic: USB
• Package / Case: 28-WSOIC
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant

7.0 Register Set
7.1.2
CLKDIV
External Clock Divisor. A hardware reset configures the divisor to 11
at the CLKOUT pin.
If the CLKDIV value is changed by firmware, the clock output is expanded/shortened if the CLKDIV value is increased/de-
creased in its current phase to allow glitch-free switching.
CODIS
Clock Output Disable. Setting this bit disables the clock output. The CLKOUT pin is frozen in its current state and resumes
with a new period when this bit is cleared.
7.1.3
This register holds the binary encoded chip revision.
REVID
Revision Identification. For this revision, 9603 Rev A, the field contains 0010
Clock Configuration Register (CCONF)
Revision Identifier (RID)
frequency = 48 MHz / (CLKDIV+1)
CODIS
bit 7
bit 7
r/w
0
(Continued)
bit 6
bit 6
Reserved
-
-
Reserved
1
0
0
1
1
INTOC
Table 5. Interrupt Output Control Bits
bit 5
bit 5
-
-
0
0
1
0
1
Disabled
Active low open drain
Active high push-pull
Active low push-pull
bit 4
bit 4
31
Interrupt Output
bit 3
bit 3
1
0
d
(decimal format), which yields a 4 MHz output clock
b
bit 2
bit 2
.
0
0
CLKDIV3-0
REVID3-0
r/w
r
bit 1
bit 1
1
1
bit 0
bit 0
1
0
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