ST7263BK2 STMicroelectronics, ST7263BK2 Datasheet - Page 105

• Manufacturer Part Number: ST7263BK2
• 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 ST7263BK2

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

ST7263Bxx
Note:
Endpoint n register B (EPnRB)
These registers (EP1RB and EP2RB) are used for controlling data reception on Endpoints 1
and 2. They are also reset by the USB bus reset.
Endpoint 2 and the EP2RB register are not available on some devices (see device feature
list and register map).
Reset value: 0000 xxxx (0xh)
Table 35.
CTRL
STAT_RX1
7
0
0
1
1
[5:4] STAT_RX [1:0] Status bits, for reception transfers.
[3:0] EA[3:0] Endpoint address.
STAT_RX bit definition
7 CTRL Control.
6 DTOG_RX Data toggle, for reception transfers.
This bit should be 0.
Note: If this bit is 1, the Endpoint is a control endpoint. (Endpoint 0 is always a
It contains the expected value of the toggle bit (0=DATA0, 1=DATA1) for the next
data packet. This bit is cleared by hardware in the first stage (Setup Stage) of a
control transfer (SETUP transactions start always with DATA0 PID). The receiver
toggles DTOG_RX only if it receives a correct data packet and the packet’s data
PID matches the receiver sequence bit.
These bits contain the information about the endpoint status, which are listed in
Table
These bits are written by software. Hardware sets the STAT_RX bits to NAK when a
correct transfer has occurred (CTR=1) related to an OUT or SETUP transaction
addressed to this endpoint, so the software has the time to elaborate the received
data before acknowledging a new transaction.
Software must write in this field the 4-bit address used to identify the transactions
directed to this endpoint. Usually EP1RB contains “0001” and EP2RB contains
“0010”.
DTOG
_RX
35.
control Endpoint, but it is possible to have more than one control Endpoint).
STAT_RX0
Doc ID 7516 Rev 8
_RX1
STAT
0
1
0
1
Read.write
_RX0
STAT
DISABLED: reception transfers cannot be
executed.
STALL: the endpoint is stalled and all reception
requests result in a STALL handshake.
NAK: the endpoint is naked and all reception
requests result in a NAK handshake.
VALID: this endpoint is enabled for reception.
EA3
Meaning
EA2
On-chip peripherals
EA1
105/186
EA0
0