Artesyn ATCA 7370 / ATCA 7370-S Installation and Use (June 2014) - Manual (Page 129)

Maps and Registers
ATCA-7370/ATCA-7370-S Installation and Use (6806800P54F) 129
6.2.3.4.2 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.
Table 6-17 Global Super IO SERIRQ and Pre-divide Control Register
Index Address: 0x29
Bit Description Default Access
0 SERIRQ enable:
0: disabled. Serial interrupts disabled.
1: enabled. Logical devices participate in
interrupt generations. 0 LPC: r/w
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 6-18 Logical Device Configuration Register Summary
Index Address Description
0x30 Enable
0x60 Base IO Address MSB
0x61 Base IO Address LSB
0x70 Primary Interrupt Select
0x74 Reserved