16

TH6503 USB Low-Speed Interface

Reading the StatusRegister

The Reading of the Status Register is the first action of the microcontroller. The TH6503 stores the

information on what’s happened on the USB in this Register

Figure 16. Reading the StatusRegister

Flowchart for

Programming the

TH6503

(continued)

Read

StatusRegister

generating a pulse on

SDI

SIN=0

Generating a rising edge

on SCK to save bit on

SDO

Generating a falling

edge on SCK to shift

next bit to SDO

more bits to read ?

Yes

No

Save SDO bit

abort transfer with

SIN=0