The recommended operating temperature range for the M48Z129V-85PM1 is -40°C to +85°C, as specified in the datasheet. However, it's essential to note that the device can tolerate a wider temperature range during storage, typically from -55°C to +125°C.
The M48Z129V-85PM1 has a built-in battery voltage monitoring feature that can be enabled or disabled through the VRTC pin. To use this feature, connect the VRTC pin to a voltage divider network that scales the battery voltage to within the 0 to VCC range. The device will then monitor the battery voltage and generate an interrupt when it falls below the programmed threshold.
The VCC pin is the power supply pin for the M48Z129V-85PM1. It should be connected to a stable voltage source, typically in the range of 2.7V to 5.5V. A decoupling capacitor (e.g., 100nF) should be placed close to the VCC pin to filter out noise and ensure reliable operation.
The M48Z129V-85PM1 can use either an external clock source or its internal oscillator. To use an external clock source, connect a crystal oscillator to the X1 and X2 pins. For internal oscillator operation, leave the X1 and X2 pins unconnected. The clock source can be selected through the Clock Control Register (CCR).
The M48Z129V-85PM1 supports clock frequencies up to 8 MHz. However, the maximum clock frequency may vary depending on the specific application and operating conditions. It's essential to consult the datasheet and application notes for more information on clock frequency limitations.
M48Z129V-85PM1 datasheet
by STMicroelectronics
