参数资料
型号: M66596FP
元件分类: 总线控制器
英文描述: UNIVERSAL SERIAL BUS CONTROLLER, PQFP64
封装: 0.50 MM PITCH, LQFP-64
文件页数: 125/133页
文件大小: 1611K
代理商: M66596FP
M66596FP/WG
rev .1.00
2006.3.14
page 89 of 127
3.7 Bulk transfers (PIPE1-5)
The user can select the buffer memory specifications for bulk transfers (single / double buffer setting, or continuous
/ non-continuous transfer mode setting). The maximum size that can be set for the buffer memory is 2 KB. The buffer
memory state is controlled by the controller, with a response sent automatically for a PING packet / NYET
handshake. If “MXPS=0” has been set, the interrupt specifications are different from those of the other pipes. For
detailed information, please refer to 3.3.3 Maximum packet size setting.
3.7.1
PING packet control in the Host mode
Transmission of the PING packet of the OUT direction is automatically sent out by this controller. An initial state
is in a PING packet sending-out state as shown below. An OUT packet is sent out after receiving an ACK handshake.
If NAK or NYET is received, it will return to a PING sending-out state.
Moreover, this control is the same as a data stage and a status stage of control transfer.
1. OUT Data Transmitting Setup
2. PING Packet Transmission
3. ACK Handshake Reception
4. OUT Data Packet Transmission
5. ACK Handshake Reception
6. OUT Data Packet Transmission
:
7. NAK/NYET Handshake Reception
8. PING Packet Transmission
The factors from which this controller returns to transmission of a PING packet are H/W reset, S/W reset,
NYET/NAK handshake reception, the set of a sequence toggle bit, a clearance (SQSET, SQCLR), and a buffer
clearance (ACLRM) setup.
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