AP500/AP520/AP521 ACROPACK
USER
’S MANUAL
Acromag, Inc. Tel: 248-295-0310
- 2 - http://www.acromag.com
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www.acromag.com
2.6 Noise and Grounding Considerations .......................................................................... 17
2.7 Logic Interface Connector ........................................................................................... 17
Table 2.3: Logic Interface Connections ........................................................................................ 18
3.0 PROGRAMMING INFORMATION ........................................................................... 19
3.1 PCI Configuration Registers .......................................................................................... 19
Table 3.1 PCI Configuration Registers ......................................................................................... 20
3.2 UART and Device Configuration Registers ..................................................................... 21
Table 3.2 UART and Device Configuration Registers ................................................................... 21
Table 3.3 Device Configuration Registers .................................................................................... 21
3.2.1 UART Channel Configuration Registers ........................................................................................22
FIFO Data Loading and Unloading n 32-bit Format ..................................................................... 22
Table 3.4 UART Channel Configuration Registers ........................................................................ 23
3.2.2 RHR - Receiver Holding Register (READ Only) ..............................................................................24
3.2.3 THR - Transmitter Holding Register (WRITE Only) ........................................................................25
3.2.4 DLL & DLM - Divisor Latch Registers, Ports A-H (R/W) .................................................................25
Table 3.5 Baud Rate Divisors(14.7456MHZ) ................................................................................ 26
3.2.5 IER - Interrupt Enable Register (R/W) ..........................................................................................27
Table 3.6 Interrupt Enable Register ............................................................................................. 27
3.2.6 ISR - Interrupt Status Register (READ Only) .................................................................................28
Table 3.7 Interrupt source ........................................................................................................... 28
3.2.7 FCR - FIFO Control Register (WRITE Only) ....................................................................................29
Table 3.8 FIFO Control Register ................................................................................................... 29
3.2.8 LCR - Line Control Register (Read/Write) .....................................................................................30
Table 3.9 Line Control Registers .................................................................................................. 30
3.2.9 MCR - Modem Control Register (R/W) ........................................................................................32
Table 3.10 Modem Control Register............................................................................................ 32
3.2.10 LSR - Line Status Register (Read/Write-Restricted) ....................................................................33
Table 3.11 Line Status Register .................................................................................................... 33
3.2.11 MSR - Modem Status Register (Read/Write) .............................................................................35
Table 3.12 Modem Status Register.............................................................................................. 35
3.2.12 SCR - Scratch Pad (Read/Write) .................................................................................................37
3.2.13 Enhanced Register Set ...............................................................................................................37
3.2.14 EFR - Enhanced Feature Register (Read/Write) ..........................................................................37
Table 3.13 EFR - Enhanced Feature Register ............................................................................... 37
3.2.15 XON/XOFF-1,2 Registers (R/W) .................................................................................................39
3.3 Model Identification ..................................................................................................... 39
Table 3.14 Model ID .................................................................................................................... 39
4.0 SERVICE AND REPAIR ............................................................................................... 40