HCS08 datasheet(307/374 Pages) NXP

307 / 374 page

Universal Serial Bus Device Controller (S08USBV1)

MC9S08JM60 Series Data Sheet, Rev. 5

Freescale Semiconductor

307

17.3.11 Address Register (ADDR)

The ADDR register contains the unique 7-bit address the device will be recognized as through USB. The

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.

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.

321

ADDR6

ADDR5

ADDR4

ADDR3

ADDR2

ADDR1

ADDR0

Reset

000

Figure 17-14. Address Register (ADDR)

Table 17-15. ADDR Field Descriptions

Field

Description

6–0

ADDR[6:0]

USB Address — This 7-bit value defines the USB address that the USB module will decode

321

FRM7

FRM6

FRM5

FRM4

FRM3

FRM2

FRM1

FRM0

Reset

000

= Unimplemented or Reserved

Figure 17-15. Frame Number Register Low (FRMNUML)

Table 17-16. FRMNUML Field Descriptions

Field

Description

7–0

FRM[7:0]

Frame Number — These bits represent the low order bits of the 11 bit frame number.

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