ST72561J6-Auto STMicroelectronics, ST72561J6-Auto Datasheet - Page 71

• Manufacturer Part Number: ST72561J6-Auto
• Description: 8-bit MCU for automotive
• Manufacturer: STMicroelectronics

Specifications of ST72561J6-Auto

• Hdflash Endurance: 100 cycles, data retention 20 years at 55 °C
• 5 Power Saving Modes: halt, auto wake up from halt, active halt, wait and slow

ST72561-Auto
7.6.1
Register description
AWUFH control/status register (AWUCSR)
Read/Write (except bit 2 read only)
Reset value: 0000 0000 (00h)
Bits 7:3 = Reserved.
Bit 2 = AWUF Auto Wake-Up Flag
This bit is set by hardware when the AWU module generates an interrupt and cleared by
software on reading AWUCSR.
Bit 1 = AWUM Auto Wake-Up Measurement
This bit enables the AWU RC oscillator and connects its output to the ICAP1 input of the 16-
bit timer. This allows the timer to be used to measure the AWU RC oscillator dispersion and
then compensate this dispersion by providing the right value in the AWUPR register.
Bit 0 = AWUEN Auto Wake-Up From Halt Enabled
This bit enables the Auto Wake-Up From Halt feature: once HALT mode is entered, the
AWUFH wakes up the microcontroller after a time delay defined by the AWU prescaler
value. It is set and cleared by software.
AWUFH prescaler register (AWUPR)
Read/Write
Reset value: 1111 1111 (FFh)
Bits 7:0 = AWUPR[7:0] Auto Wake-Up Prescaler
These 8 bits define the AWUPR Dividing factor as explained below:
Table 23.
AWUPR7
0: No AWU interrupt occurred
1: AWU interrupt occurred
0: Measurement disabled
1: Measurement enabled
0: AWUFH (Auto Wake-Up From Halt) mode disabled
1: AWUFH (Auto Wake-Up From Halt) mode enabled
7
0
7
AWUPR[7:0
AWUPR prescaler
AWUPR6
00h
01h
...
0
]
AWUPR5
0
Doc ID 12370 Rev 8
AWUPR4
0
AWUPR3
0
Forbidden (See note)
Dividing factor
AWUPR2
AWUF
...
1
Power saving modes
AWUPR1
AWUM
AWUPR0
AWUEN
0
0
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