Freescale Semiconductor MC68HC08KH12 I/O Register Description of the Embedded Device Function

9.4.10 USB HUB Endpoint 0 Data Registers 0-7 (HE0D0-HE0D7)

Address:	$0030
	Bit 7	6	5	4	3	2	1	Bit 0
Read:	HE0R07	HE0R06	HE0R05	HE0R04	HE0R03	HE0R02	HE0R01	HE0R00
Write:	HE0T07	HE0T06	HE0T05	HE0T04	HE0T03	HE0T02	HE0T01	HE0T00
Reset:	X	X	X	X	X	X	X	X
↓								↓
Address:	$0037
Read:	HE0R77	HE0R76	HE0R75	HE0R74	HE0R73	HE0R72	HE0R71	HE0R70
Write:	HE0T77	HE0T76	HE0T75	HE0T74	HE0T73	HE0T72	HE0T71	HE0T70
Reset:	X	X	X	X	X	X	X	X

X = Indeterminate

Figure 9-11. USB HUB Endpoint 0 Data Register (HE0D0-HE0D7)

HE0Rx7-HE0Rx0 — HUB Endpoint 0 Receive Data Buffer

These read only bits are serially loaded with OUT token or SETUP token data directed at HUB Endpoint 0. The data is received over the USB’s D0+ and D0– pins.

HE0Tx7-HE0Tx0 — HUB Endpoint 0 Transmit Data Buffer

These write only buffers are loaded by software with data to be sent on the USB bus on the next IN token directed at HUB Endpoint 0.

9.5 I/O Register Description of the Embedded Device Function

The USB embedded device function provides a set of control/status registers and twenty-four data registers that provide storage for the buffering of data between the USB embedded device function and the CPU. These registers are shown in Table 9-3and Table 9-4.

Advance Information	MC68HC(7)08KH12 — Rev. 1.1
134	Freescale Semiconductor