Preliminary User’s Manual U19014EJ1V0UD
271
CHAPTER 12 USB FUNCTION CONTROLLER USBF
The
µ
PD78F0730 has an internal USB function controller (USBF) conforming to the Universal Serial Bus
Specification.
12.1 Overview
•
Conforms to the Universal Serial Bus Specification.
•
Supports 12 Mbps (full-speed) transfer
•
Endpoint for transfer incorporated
Endpoint Name
FIFO Size (Bytes)
Transfer Type
Remark
Endpoint0 Read
64
Control transfer
−
Endpoint0 Write
64
Control transfer
−
Endpoint1 64
×
2
Bulk 1 transfer (IN)
2-buffer configuration
Endpoint2 64
×
2
Bulk 1 transfer (OUT)
2-buffer configuration
•
Clock: f
USB
= 48 MHz
(The clock source is selectable. see
5.3 (9) PLL control register
.)
Caution When using the USB function, be sure to set (1) the UCKCNT bit of the UCKC register.
If the registers related to the USB function while the UCKCNT bit is 0, 0 is read.
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