MC9S08JM16 Datasheet, PDF (309/386 Pages) Freescale Semiconductor, Inc – Microcontrollers

Universal Serial Bus Device Controller (S08USBV1)
17.3.11 Address Register (ADDR)
The ADDR register contains the unique 7-bit address the device will be recognized as through USB. The
register is reset to 0x00 after the reset input has gone active or the USB module has decoded USB reset
signaling. That will initialize the address register to decode address 0x00 as required by the USB
specification. Firmware will change the value when it processes a SET_ADDRESS request.
7
R
0
W
Reset
0
6
ADDR6
5
ADDR5
4
ADDR4
3
ADDR3
2
ADDR2
0
0
0
0
0
Figure 17-14. Address Register (ADDR)
1
ADDR1
0
Table 17-15. ADDR Field Descriptions
Field
Description
6–0
USB Address — This 7-bit value defines the USB address that the USB module will decode
ADDR[6:0]
0
ADDR0
0
17.3.12 Frame Number Register (FRMNUML, FRMNUMH)
The frame number registers contains the 11-bit frame number. The frame number registers require two
8-bit registers to implement. The low order byte is contained in FRMNUML, and the high order byte is
contained in FRMNUMH. These registers are updated with the current frame number whenever a SOF
TOKEN is received.
R
W
Reset
7
FRM7
0
6
FRM6
5
FRM5
4
FRM4
3
FRM3
2
FRM2
0
0
0
0
0
= Unimplemented or Reserved
Figure 17-15. Frame Number Register Low (FRMNUML)
1
FRM1
0
Table 17-16. FRMNUML Field Descriptions
Field
Description
7–0
Frame Number — These bits represent the low order bits of the 11 bit frame number.
FRM[7:0]
0
FRM0
0
MC9S08JM16 Series Data Sheet, Rev. 2
Freescale Semiconductor
309