ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 90

• 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

USB interface (USB)
14.4
14.4.1
14.4.2
90/139
Figure 41. USB block diagram
Register description
DMA address register (DMAR)
Bits 7:0=DA[15:8] DMA address bits 15-8.
Software must write the start address of the DMA memory area whose most significant bits
are given by DA15-DA6. The remaining 6 address bits are set by hardware. See the
description of the IDR register and
Interrupt/DMA register (IDR)
Bits 7:6 = DA[7:6] DMA address bits 7-6.
Software must reset these bits. See the description of the DMAR register and
Bits 5:4 = EP[1:0] Endpoint number (read-only). These bits identify the endpoint which
required attention.
00: Endpoint 0
01: Endpoint 1
10: Endpoint 2
USBGND
DMAR
IDR
USBVCC
USBDM
USBDP
DA15
R/W
R/W
DA7
7
7
DA14
R/W
R/W
DA6
6
6
Transceiver
Voltage
Regulator
3.3V
DA13
R/W
EP1
R/W
5
5
SIE
Figure
DA12
R/W
R/W
EP0
4
4
6 MHz
42.
REGISTERS
INTERRUPT
REGISTERS
CNT3
DA11
ENDPOINT
R/W
R/W
3
3
DMA
CNT2
DA10
R/W
R/W
2
2
Reset value:
Reset value:
Address,
data buses
and interrupts
CNT1
R/W
R/W
DA9
MEMORY
1
1
xxxx 0000 (x0h)
CPU
undefined (xxh)
Figure
ST7260xx
CNT0
R/W
R/W
DA8
42.
0
0