CC-W9M-NA37-XE Digi International, CC-W9M-NA37-XE Datasheet - Page 17

• Manufacturer Part Number: CC-W9M-NA37-XE
• Description: MOD WI-9M 64MB SDRAM 128MB FLASH
• Manufacturer: Digi International
• Series: -r

Specifications of CC-W9M-NA37-XE

• Module/board Type: Core Module
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• For Use With/related Products: Networking

Power
management
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C h a p t e r 1
ConnectCore 9M 2443 & Wi-9M 2443 Hardware Reference
low battery state. If this feature is not used, the pin has to be left open, because a
10k pull up resistor is provided at the module.
Analog voltage AVCC and AGND, e.g. for a touch screen, are also provided on the
module system connector.
For the power control logic, the S3C2443 has various power management schemes
to keep optimal power consumption for a given task. These schemes are related to
PLL, clock control logics (ARMCLK, HCLK, and PCLK) and wake up signals.
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The following figure shows the clock distribution:
The power management block in the S3C2443 can activate four modes: NORMAL,
STOP, IDLE, and SLEEP. These are described below.
ARMCLK is used for ARM920T core.
HCLK is the reference clock for internal AHB bus and peripherals such as the
memory controller, the interrupt controller, LCD controller, the DMA, USB host
block, System Controller, Power down controller and etc.
PCLK is used for internal APB bus and peripherals such as WDT, IIS, I2C, PWM
timer, ADC, UART, GPIO, RTC and SPI etc.