Micrel, Inc.

MIC2555

June 2005

21

M9999-060805

(408) 955-1690

Control Bit Locator

Location

Control Bit

Control Register 1

Control Register 2

Control Register 3

Interrupt Source

GPIO Interrupt

bdis_acon, (sess_end)

B6

bdis_acon_en

B4

cp_off

B1

cr_int

B7

cr_int_sel

B3

dat_se0

B2

dm_pull-down

B3

dm_pull-up

B1

dp_pull-down

B2

dp_pull-up

B0

ext_osc

B5

GPIO_0

B0

GPIO_1

B1

GPIO_2

B2

id_det_off

B2

id_float

B5

id_gnd_in

B3

id_gnd_out

B4

oe_int_en

B5

rcs_dis

B6

scl_en

B7

se_dm

B4

se_dp

B2

sess_end_en

B4

sess_vld

B1

pwr_dn

B0

speed

B0

suspend

B1

test bit

B3

uart_en

B6

uart_io

B7

vbus_chrg

B7

vbus_dischrg

B6

vbus_drv

B5

vbus_vld

B0

Serial Controller Register Bits

Example Table Format

Column Titles

Field name

Size (bits)

Access

Register

Addresses

(1)

Description

Note:

Access type “rd/s/c” denotes a field that can be read, set to 1 or cleared to 0. The register can be read from either of

the Addresses indicated. When writing to the “set” Address, any 1s that are written cause the associated bit to be set.

When writing to the “clr” (Clear) Address, any 1s that are written cause the associated bit to be cleared.

Device ID Registers

MSB -> Higher byte of two byte word

LSB -> Lower byte of two byte word

vendor_id

16

rd

00h

USB-IF Vendor ID number. Address 00h contains

lower byte of Vendor ID. Address 01h contains upper

byte of Vendor ID.

product_id

16

rd

02h

A number unique to each manufacturer, for each

device type produced. The manufacturer assigns this

number. Address 02h contains lower byte. Address

03h contains upper byte.