Техническая Спецификация для Freescale Semiconductor Tower System Eval Kit for MC9S12GN32 TWR-S12GN32-KIT TWR-S12GN32-KIT

Модели

TWR-S12GN32-KIT

Reference Voltage Attenuator (RVAV1)

MC9S12G Family Reference Manual,

Rev.1.23

264

Freescale Semiconductor

Figure 4-1. RVA Module Block Diagram

4.4

External Signals

The RVA has two external input signals, VRH and VSSA.

4.5

Modes of Operation

1. Attenuation Mode

The RVA is attenuating the reference voltage when enabled by the register control bit and the MCU
not being in STOP mode.

2. Bypass Mode

The RVA is in bypass mode either when disabled or during STOP mode. In these cases the resistor
ladder of the RVA is disconnected for power saving.

VRH_INT

VRL_INT

to ADC

RVA

RVAON

VSSA

VRH

STOP