ST72T511R9T6 STMicroelectronics, ST72T511R9T6 Datasheet - Page 35

• Manufacturer Part Number: ST72T511R9T6
• Description: Microcontrollers (MCU) UV EPROM 60K SPI/SCI
• Manufacturer: STMicroelectronics

Specifications of ST72T511R9T6

• Data Bus Width: 8 bit
• Program Memory Type: EEPROM
• Program Memory Size: 60 KB
• Data Ram Size: 2048 B
• Interface Type: CAN, SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 48
• Number Of Timers: 5
• Operating Supply Voltage: 3 V to 5.5 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Package / Case: TQFP-64
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / Rohs Status: No

POWER SAVING MODES (Cont’d)
7.3 WAIT MODE
WAIT mode places the MCU in a low power con-
sumption mode by stopping the CPU.
This power saving mode is selected by calling the
‘WFI’ instruction.
All peripherals remain active. During WAIT mode,
the I[1:0] bits of the CC register are forced to ‘10’,
to enable all interrupts. All other registers and
memory remain unchanged. The MCU remains in
WAIT mode until an interrupt or RESET occurs,
whereupon the Program Counter branches to the
starting address of the interrupt or Reset service
routine.
The MCU will remain in WAIT mode until a Reset
or an Interrupt occurs, causing it to wake up.
Refer to Figure 20.
ST72311R, ST72511R, ST72512R, ST72532R
Figure 20. WAIT Mode Flow-chart
Note:
1. Before servicing an interrupt, the CC register is
pushed on the stack. The I[1:0] bits of the CC reg-
ister are set to the current software priority level of
the interrupt routine and recovered when the CC
register is popped.
WFI INSTRUCTION
N
INTERRUPT
Y
OR SERVICE INTERRUPT
FETCH RESET VECTOR
4096 CPU CLOCK CYCLE
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
OSCILLATOR
PERIPHERALS
CPU
I[1:0] BITS
I[1:0] BITS
I[1:0] BITS
N
DELAY
RESET
Y
XX
OFF
OFF
ON
ON
ON
ON
ON
ON
ON
10
10
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