MC9S12G FREESCALE [Freescale Semiconductor, Inc], MC9S12G Datasheet - Page 222

• Manufacturer Part Number: MC9S12G
• Description: Ignores external trigger. Performs one conversion sequence and stops.
• Manufacturer: FREESCALE [Freescale Semiconductor, Inc]

1
Reference Voltage Attenuator (RVAV1)
4.6
4.6.1
Table 4-1
4.6.2
4.6.2.1
4.7
The RVA is a prescaler for the ADC reference voltage. If the attenuation is turned off the resistive divider
is disconnected from VSSA, VRH_INT is connected to VRH and VRL_INT is connected to VSSA. In this
mode the attenuation is bypassed and the resistive divider does not draw current.
222
Address 0x0276
RVAON
Read: Anytime
Write: Anytime
Field
Reset
Global Address
Register Name
0
This document is valid for the S12G96 and the S12G128 device. All information related to other devices is preliminary.
W
RVACTL
R
0x0276
Memory Map and Register Definition
Functional Description
shows the RVA register map.
RVA On —
This bit turns on the reference voltage attenuation.
0 RVA in bypass mode
1 RVA in attenuation mode
Register Map
Register Descriptions
RVA Control Register (RVACTL)
0
0
7
W
R
Bit 7
0
0
6
0
Table 4-2. RVACTL Register Field Descriptions
Figure 4-2. RVA Control Register (RVACTL)
MC9S12G Family Reference Manual,
= Unimplemented or Reserved
6
0
0
0
5
Table 4-1. RVA Register Map
5
0
0
0
4
Description
4
0
0
0
3
Rev.1.01
3
0
2
0
0
2
0
Freescale Semiconductor
Access: User read/write
0
0
1
1
0
RVAON
RVAON
Bit 0
0
0
1