ST7260E1 STMicroelectronics, ST7260E1 Datasheet - Page 43

• 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
11
Miscellaneous register
Table 21.
Table 22.
MISCR
Address (Hex.) Register label
Bit
7:3
2
1
0
7
0009h
-
Name
MCO
USB
SMS
OE
MISCR register description
Miscellaneous register map and reset values
Reserved
Slow mode select
This bit is set by software and only cleared by hardware after a reset. If this bit is set, it
enables the use of an internal divide-by-2 clock divider (refer to
The SMS bit has no effect on the USB frequency.
USB enable
If this bit is set, the port PC2 (PB1 on SO24) outputs the USB output enable signal (at
“1” when the ST7 USB is transmitting data). Unused bits 7-4 are set.
Main clock out selection
This bit enables the MCO alternate function on the PA0 I/O port. It is set and cleared
by software.
0: Divide-by-2 disabled and CPU clock frequency is standard
1: Divide-by-2 enabled and CPU clock frequency is halved
0: MCO alternate function disabled (I/O pin free for general-purpose I/O)
1: MCO alternate function enabled (f
6
-
MISCR
reset value
5
-
7
4
-
6
Function
CPU
5
3
-
on I/O port)
4
SMS
R/W
2
Reset value: 0000 0000 (00h)
3
Miscellaneous register
Figure 15 on page
SMS
USBOE
2
0
R/W
1
USB
OE
1
0
MCO
R/W
0
43/139
MCO
29).
0
0