GT3200-ABZJ ETC, GT3200-ABZJ Datasheet - Page 23
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GT3200-ABZJ
Manufacturer Part Number
GT3200-ABZJ
Description
USB2.0 PJY IC
Manufacturer
ETC
Datasheet
1.GT3200-ABZJ.pdf
(51 pages)
- Current page: 23 of 51
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USB2.0 PHY IC
Chapter 7 Functional Overview
SMSC GT3200, SMSC USB3250
7.1
Figure 2.1 Block Diagram on page 2
USB3250. Each of the functions is described in detail below.
The GT3200, SMSC USB3250 support two modes of operation. See
of the digital interface.
■
■
Modes of Operation
8-bit unidirectional mode. Selected when DATABUS16_8 = 0. CLKOUT runs at 60MHz. The 8-
bit transmit data bus uses the lower 8 bits of the DATA bus (ie, TXDATA[7:0] = DATA[7:0]). The
8-bit receive data bus uses the upper 8 bits of the DATA bus (ie, RXDATA[7:0] = DATA[15:8]).
16-bit bidirectional mode. Selected when DATABUS16_8 = 1. CLKOUT runs at 30MHz. An
additional signal (VALIDH) is used to identify whether the high byte of the respective 16-bit data
word is valid. The full 16-bit DATA bus is used for transmit and receive operations.
is asserted, then the DATA[15:0] bus accepts transmit data from the SIE. If TXVALID is deasserted,
then the DATA[15:0] bus presents received data to the SIE. VALIDH is undefined when
DATABUS16_8 = 0 (8-bit mode).
DATASHEET
shows the functional block diagram of the GT3200, SMSC
18
Figure 7.1
Revision 1.3 (10-05-04)
for a block diagram
If TXVALID
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