General Standards Corporation PCIe-SIO4BX2, Руководство пользователя

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CHAPTER 2: LOCAL SPACE REGISTERS
2.0 Register Map
The SIO4BX2 is accessed through three sets of registers – PCI Registers, USC Registers, and GSC Firmware
Registers. The GSC Firmware Registers and USC Registers are referred to as Local Space Registers and are
described below. The PCI registers are discussed in Chapter 3.
The Local Space Registers are divided into two distinct functional register blocks – the GSC Firmware Registers and
the USC Registers. The GSC Firmware Registers perform the custom board control functions, while the USC
Registers map the Zilog Z16C30 registers into local address space. The register block for each USC channel is
accessed at a unique address range. The table below shows the address mapping for the local space registers.
Local Address Range Base Address Offset Register Block Description
0x0000 – 0x00FF 0x0000 GSC Firmware Registers
0x0100 – 0x013F 0x0100 Channel 1 USC Registers
0x0140 – 0x01FF Reserved
0x0200 – 0x023F 0x0200 Channel 2 USC Registers
0x0240 – 0x02FF Reserved
0x0300 – 0x033F 0x0300 Channel 3 USC Registers
0x0340 – 0x03FF Reserved
0x0400 – 0x043F 0x0400 Channel 4 USC Registers
The GSC Firmware Registers are detailed in Section 2.1. The USC Registers are briefly touched on in Section 2.2 of
this manual, but are described in much greater detail in the Zilog Z16C30 Users Manuals.
2.1 GSC Firmware Registers
The GSC Firmware Registers provide the primary control/status for the SIO4BX2 board. The following table shows
the GSC Firmware Registers.
Offset Address Size Access* Register Name Default Value (Hex)
0x0000 D32 Read/Write Firmware Revision E51001XX
0x0004 D32 Read/Write Board Control 00000000
0x0008 D32 Read Only Board Status 000000XX
0x000C D32 Read/Write Timestamp 00000000
0x0010 D32 Read/Write Ch 1 Tx Almost Full/Empty 00070007
0x0014 D32 Read/Write Ch 1 Rx Almost Full/Empty 00070007
0x0018 D32 Read/Write Ch l 1 Data FIFO 000000XX
0x001C D32 Read/Write Ch 1 Control/Status 0000CC00
0x0020 D32 Read/Write Ch 2 Tx Almost Full/Empty 00070007
0x0024 D32 Read/Write Ch 2 Rx Almost Full/Empty 00070007
0x0028 D32 Read/Write Ch 2 FIFO 000000XX
0x002C D32 Read/Write Ch 2 Control/Status 0000CC00
0x0030 D32 Read/Write Ch 3 Tx Almost Full/Empty 00070007
0x0034 D32 Read/Write Ch 3 Rx Almost Full/Empty 00070007
0x0038 D32 Read/Write Ch 3 Data FIFO 000000XX