
Maps and Registers
ATCA-7540 Installation and Use (6806871A01A)
107
5.1.3.4.2 Logical Device Configuration Registers
Use to access the registers that are assigned to each logical unit. The Super IO supports two
logical units and has two sets of logical device registers. The two logical devices are UART1
(Logical Number 4) and UART2 (Logical Number 5). A separate set (bank) of control and
configuration registers exists for each logical device and is selected with the Logical Device
Number Register. The INDEX PORT is used to select a specific logical device register. These
registers are then accessed through the DATA PORT. The Logical Device registers are accessible
only when the device is in the Configuration state.
1
SERIRQ Mode:
1: Continuous Mode
1
LPC: r
3:2
UART Clock pre-divide
00: divide by 1
01: divide by 8
10: divide by 26 (
CLK_UART
is 48 MHz)
11: reserved
0
LPC: r/w
7:4
Reserved
0
LPC: r
Table 5-13. Global Super IO SERIRQ and Pre-divide Control Register (continued)
Index Address: 0x29
Bit
Description
Default
Access
Table 5-14. Logical Device Configuration Register Summary
Index Address
Description
0x30
Enable
0x60
Base I/O Address MSB
0x61
Base I/O Address LSB
0x70
Primary Interrupt Select
0x74
Reserved
0x75
Reserved
0xF0
Reserved
Содержание ATCA-7540
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