IP2022 Data Sheet
www.ubicom.com
65
5.6.2
SxMODE Register
Table 5-9 Signal Usage
Mode
SxRXD
SxRXP
SxRXM
SxTXM
SxTXP
SxTPE
SxTME
SxCLK
Disabled
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
Not Used
10Base-T
Input
Input
Input
Output
Output
Output
Not Used
Input
USB Bus
Input
Not Used
Not Used
Output
Output
Output
Output
Not Used
UART
Input
Not Used
Not Used
Not Used
Output
Not Used
Not Used
Not Used
SPI
Input
Note 1
Not Used
Not Used
Output
Not Used
Not Used
Note 2
GPSI
Input
Input
Not Used
Input/Out-
put
Output
Output
Input
Note 2
Note 1. Not used in master mode, input in slave mode.
Note 2. Output in master mode, input in slave mode.
Table 5-10 Required Clock Frequencies from PLL
Protocol
Receive
Transmit
USB 1.1 High Speed
48 MHz
12 MHz
USB 1.1 Low Speed
6 MHz
1.5 MHz
10Base-T Ethernet
80 MHz
20 MHz
7
6
5
4
3
2
1
0
PRS3:0
SUBM1:0
CLKS1:0
Name
Description
PRS3:0
Protocol select (see Table 4-7). All other
encodings are reserved.
0000 = Disabled
0001 = 10Base-T
0010 = USB Bus
0011 = UART
0101 = SPI
0110 = GPSI
SUBM1:0
Submode select
USB mode:
01 = Low-speed USB interface
10 = High-speed USB interface
SPI mode:
00 = Positive clock polarity, receive
on rising edge, transmit on fall-
ing edge
01 = Positive clock polarity, receive
on falling edge, transmit on ris-
ing edge
10 = Negative clock polarity, receive
on falling edge, transmit on ris-
ing edge
11 = Negative clock polarity, receive
on rising edge, transmit on fall-
ing edge
GPSI mode:
00 = Receive on rising edge, trans-
mit on falling edge
01 = Receive on falling edge, trans-
mit on falling edge
10 = Receive on rising edge, trans-
mit on rising edge
11 = Receive on falling edge, trans-
mit on rising edge
Name
Description