ST7265X datasheet(57/166 Pages) STMICROELECTRONICS

57 / 166 page

ST7265x

57/166

MISCELLANEOUS REGISTERS (Cont’d)

MISCELLANEOUS REGISTER 2 (MISCR2)

Reset Value: 0000 0000 (00h)

Bits 7:5 = Reserved.

Bits 4:0 = P[4:0]

Power Management Bits

These bits are set and cleared by software. They

can be used to switch the on-chip peripherals of

the microcontroller ON or OFF. The registers are

not changed by switching the peripheral OFF and

then ON (contents are frozen while OFF).

0: Peripheral ON (running)

1: Peripheral OFF

MISCELLANEOUS REGISTER 3 (MISCR3)

Read /Write

Reset Value: 0000 0000 (00h)

Bit 7 = WDGHALT

Watchdog and HALT Mode

This bit is set and cleared by software. It deter-

mines if a RESET is generated when entering Halt

mode while the Watchdog is active (WDGA bit =1

in the WDGCR register).

In either case, the Watchdog will not reset the

MCU if a HALT instruction is executed while the

USB is in Suspend mode.

0: If the Watchdog is active, it will reset the MCU if

a HALT instruction is executed (unless the USB

is in Suspend mode)

1: When a HALT instruction is executed, the MCU

will enter Halt mode (without generating a reset)

even if the Watchdog is active.

Bits 6:4 = Reserved, forced by hardware to 0.

Bits 3:2= IS3[1:0]

ei2 Interrupt sensitivity

Interrupt sensitivity, defined using the IS3[1:0] bits,

is applied to the ei2 interrupts (Port C):

These 2 bits must be written only when I1 and I0 of

the CC register are both set to 1 (level 3).

Bit 1 = PWM1

PWM1 Output Control

0: PWM1 Output alternate function disabled (I/O

pin free for general purpose I/O).

1: PWM1 Output alternate function enabled

Bit 0 = PWM0

PWM0 Output Control

0: Output alternate function disabled (I/O pin free

for general purpose I/O).

1: PWM0 Output alternate function enabled

Table 16. Miscellaneous Register Map and Reset Values

P4P3P2

P1P0

Bit

Peripheral

PWM

Timer

I2C

USB

DTC

WDG

HALT

IS31

IS30 PWM1 PWM0

IS31 IS30

External Interrupt Sensitivity

Falling edge & low level

Rising edge only

Falling edge only

Rising and falling edge

Address

(Hex.)

Label

MISCR1

Reset Value

IS11

IS10

MCO

IS21

IS20

CP1

CP0

CPEN

MISCR2

Reset Value

MISCR3

Reset Value

WDGHALT

IS31

IS30

PWM1

PWM0

ST7265X Datasheet(PDF) 57 Page - STMicroelectronics

ST7265X Datasheet(HTML) 57 Page - STMicroelectronics

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL