ST7263BK1 STMicroelectronics, ST7263BK1 Datasheet - Page 100

• Manufacturer Part Number: ST7263BK1
• Description: LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 32K FLASH/ROM, DFU CAPABILITY, 8-BIT ADC, WDG, TIMER, SCI and I2C
• Manufacturer: STMicroelectronics

Specifications of ST7263BK1

• 4, 8, 16 Or 32 Kbytes Program Memory: high density Flash (HDFlash), FastROM or ROM with Read-Out and Write protection

On-chip peripherals
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PID register (PIDR)
Reset value: xx00 0000 (x0h)
Table 33.
TP3
7
TP3
[7:6] TP[3:2] Token PID bits 3 & 2.
[5:3] Reserved. Forced by hardware to 0.
0
1
1
TP bit definition
2 RX_SEZ Received single-ended zero
1 RXD Received data
0 Reserved. Forced by hardware to 0.
TP2
USB token PIDs are encoded in four bits. TP[3:2] correspond to the variable token
PID bits 3 & 2.
: PID bits 1 & 0 have a fixed value of 01.
Note: When a CTR interrupt occurs (see register ISTR) the software should read
This bit indicates the status of the RX_SEZ transceiver output.
0: No SE0 (single-ended zero) state
1: USB lines are in SE0 (single-ended zero) state
0: No K-state
1: USB lines are in K-state
This bit indicates the status of the RXD transceiver output (differential receiver
output).
If the environment is noisy, the RX_SEZ and RXD bits can be used to secure the
application. By interpreting the status, software can distinguish a valid End
Suspend event from a spurious wakeup due to noise on the external USB line. A
valid End Suspend is followed by a Resume or Reset sequence. A Resume is
indicated by RXD=1, a Reset is indicated by RX_SEZ=1.
the TP3 and TP2 bits to retrieve the PID name of the token received.
The USB standard defines TP bits (see
0
Doc ID 7516 Rev 8
TP2
0
0
1
0
Read only
0
Table
RX_
SEZ
33).
PID Name
SETUP
OUT
IN
RXD
ST7263Bxx
0
0