CP3UB17G38 NSC [National Semiconductor], CP3UB17G38 Datasheet - Page 113
CP3UB17G38
Manufacturer Part Number
CP3UB17G38
Description
CP3UB17 Reprogrammable Connectivity Processor with USB Interface
Manufacturer
NSC [National Semiconductor]
Datasheet
1.CP3UB17G38.pdf
(200 pages)
- Current page: 113 of 200
- Download datasheet (3Mb)
UEEI
18.3.9
The UOVR register is a byte-wide, read/write register that
specifies the oversample rate. At reset, the UOVR register
is cleared. The register format is shown below.
UOVSR
18.3.10 UART Mode Select Register 2 (UMDSL2)
The UMDSL2 register is a byte-wide, read/write register that
controls the sample mode used to recover asynchronous
data. At reset, the UOVR register is cleared. The register
format is shown below.
USMD
7
7
UART Oversample Rate Register (UOVR)
Reserved
The Enable Receive Error Interrupt bit, when
set, enables generation of an interrupt when
the hardware sets the UERR bit in the USTAT
register.
0 – Receive error interrupt disabled.
1 – Receive error interrupt enabled.
The Oversampling Rate field specifies the
oversampling rate, as given in the following ta-
ble.
The USMD bit controls the sample mode for
asynchronous transmission.
0 – UART determines the sample position au-
1 – The USPOS register determines the sam-
tomatically.
ple position.
0000–0110
UOVSR3:0
Reserved
0111
1000
1001
1010
1011
1100
1101
1110
1111
4
3
Oversampling Rate
UOVSR
1
16
10
11
12
13
14
15
7
8
9
USMD
0
0
113
18.3.11 UART Sample Position Register (USPOS)
The USPOS register is a byte-wide, read/write register that
specifies the sample position when the USMD bit in the
UMDSL2 register is set. At reset, the USPOS register is ini-
tialized to 06h. The register format is shown below.
USAMP
7
Reserved
The Sample Position field specifies the over-
sample clock period at which to take the first
of three samples for sensing the value of data
bits. The clocks are numbered starting at 0
and may range up to 15 for 16× oversampling.
The maximum value for this field is (oversam-
pling rate - 3). The table below shows the
clock period at which each of the three sam-
ples is taken, when automatic sampling is en-
abled (UMDSL2.USMD = 0).
The USAMP field may be used to override the
automatic selection, to choose any other clock
period at which to start taking the three sam-
ples.
Oversampling Rate
4
10
11
12
13
14
15
16
7
8
9
3
USAMP
Sample Position
1
2
2
3
3
4
4
5
5
6
6
www.national.com
2
3
3
4
4
5
5
6
6
7
7
0
3
4
4
5
5
6
6
7
7
8
8
Related parts for CP3UB17G38
Image
Part Number
Description
Manufacturer
Datasheet
Request
R
Part Number:
Description:
Thin SOT23 1A Load Step-Down DC-DC Regulator
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
TRI-STATE Dual Receiver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Hex MOS Drivers
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Printer Solenoid Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Quad High Current Peripheral Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
(RS-422/RS-423) Line Drivers with TRI-STATE Outputs
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Multipoint RS485/RS422 Transceivers/Repeaters
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Low Power EIA-RS-485 Transceiver with Sleep Mode
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
BTL Handshake Transceiver
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Octal 80-Bit Static Shift Register
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
PUSH BUTTON PULSE DIALER CIRCUITS
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Hex Schmitt Trigger with Extended Input Voltage
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Microprocessor Real Time Clock
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Dual Line Receivers
Manufacturer:
NSC [National Semiconductor]
Datasheet:
Part Number:
Description:
Dual TRI-STATE Differential Line Driver
Manufacturer:
NSC [National Semiconductor]
Datasheet: