ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 91

• Manufacturer Part Number: ST7260E1
• Description: LOW SPEED USB 8-BIT MCU FAMILY WITH UP TO 8K FLASH/ROM AND SERIAL COMMUNICATION INTERFACE (SCI)
• Manufacturer: STMicroelectronics

Specifications of ST7260E1

• 4 Or 8 Kbytes Program Memory: high density Flash (HDFlash), or FastROM with readout and write protection

ST7260xx
Note:
14.4.3
Note:
When a CTR interrupt occurs (see register ISTR) the software should read the EP bits to
identify the endpoint which has sent or received a packet.
Bits 3:0 = CNT[3:0] Byte count (read only).
This field shows how many data bytes have been received during the last data reception.
Not valid for data transmission.
Figure 42. DMA buffers
PID register (PIDR)
Bits 7:6 = TP[3:2] Token PID bits 3 & 2.
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.
When a CTR interrupt occurs (see register ISTR) the software should read the TP3 and TP2
bits to retrieve the PID name of the token received.
The USB standard defines TP bits as:
Table 43.
Bits 5:3 Reserved. Forced by hardware to 0.
PIDR
TP3
R
7
TP3
0
1
1
TP bits
DA15-6,000000
TP2
R
6
R
5
0
TP2
0
0
1
R
101111
101000
100111
100000
011111
011000
010111
010000
001111
001000
000111
000000
4
0
R
3
0
Endpoint 2 RX
Endpoint 1 RX
Endpoint 0 RX
Endpoint 2 TX
Endpoint 1 TX
Endpoint 0 TX
RX_
SEZ
R
2
Reset value:
PID name
SETUP
OUT
USB interface (USB)
IN
RXD
R
1
xxxx 0000 (x0h)
R
0
0
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