參數(shù)資料
型號(hào)： TC3299A
廠商： Electronic Theatre Controls, Inc.
英文描述： Ethernet PCMCIA Controller + COMBO Transceiver
中文描述： PCMCIA控制器組合以太網(wǎng)收發(fā)器
文件頁(yè)數(shù)： 15/26頁(yè)
文件大?。?/td> 1301K
代理商： TC3299A
TC3299A
Preliminary Data Sheet
REGISTER DESCRIPTIONS: Command Register (CR) (Read/Write)
The Command Register is used to initiate transmissions, enable or disable Remote DMA operations and
to select register pages. To issue a command the microprocessor sets the corresponding bit(s) (RD2,
RD1, RD0, and TXP). Further commands may be overlapped, but with the following rules:(1) if a transmit
command overlaps with a remote DMA operation, bits RD0, RD1, and RD2 must be maintained for the
remote DMA command when setting the TXP bit. Note, if a remote DMA command is re-issued when
giving the transmit command, the DMA will complete immediately if the remote byte count register have
not been reinitialized. (2) If a remote DMA operation overlaps a transmission, RD0, RD1, and RD2 may
be written with the desired values and a
”
0
”
to this bit has no effect. (3) A remote write DMA may not
overlap remote read operation or visa versa. Either of these operations must either complete or be
aborted before the other operation may start. Bits PS1, PS0, RD2, and STP may be set any time.
7
6
5
4
PS1
PS0
RD2
RD1
Bit
Symbol
D0
STP
Stop: Software reset command, takes the controller offline, no packets will
be received or transmitted. Any reception of transmission in progress will
continue to completion before entering the reset state. To exit this state,
the STP bit must be reset. The software reset is executed only when the
RST bit in the ISR being set to a 1. STP powers up high.
D1
STA
Start: This bit is used to active the EPCC core after either power up, or
when the EPCC cord has been placed in a reset mode by software
command. STA power up low.
D2
TXP
Transmit Packet: This bit must be set to initiate transmission of a packet.
TXP is internally reset either after the transmission is completed or
aborted. This bit should be set only after the Transmit Byte Count and
Transmit Page Start registers have been programmed. TXP powers up low.
D3-D5
RD0-RD2
Remote DMA Command: These three encoded bits control operation of
the Remote DMA channel. RD2 can be set to about any Remote DMA
command in progress. The Remote Start Addresses are not restored to
the starting address if the Remote DMA is aborted. RD2 powers up high.
RD2 RD1 RD0
0 0 0 Not Allowed
0 0 1 Remote Read
0 1 0 Remote Write (Note)
0 1 1 Send Packet
1 X X Abort/Complete Remote DMA (Note)
D6,D7
PS0,PS1
Page Select: Three two encoded bits select which register page is to be
accessed with addresses A0-3.
PS1 PS0
0 0 Register Page 0
0 1 Register Page 1
1 0 Register Page 2
1 1 Register Page 3
Data Configure register (DCR)
This Register is used to program the EPCC for 8 or 16-bit memory interfaces, select byte ordering in
16-bit applications and establish FIFO thresholds. The DCR must be initialized prior to load the Remote
Byte count Registers.
3
2
1
0
RD0
TXP
STA
STP
Description
Confidential.
Copyright
2003, IC Plus Corp.
15/26
August 27, 20003
TC3299A-DS-R30
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