mc9s12vr48 Freescale Semiconductor, Inc, mc9s12vr48 Datasheet - Page 99

• Manufacturer Part Number: mc9s12vr48
• Description: S12 Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

External pullup device
Freescale Semiconductor
1. Enable analog function on HVIx in non-direct mode (PTAL[PTAENL]=1, PTAL[PTADIRL]=0,
2. Select internal pulldown device on selected HVI (PTAL[PTPSL]=0)
3. Enable function to force input buffer active on selected HVI in analog mode (PTAL[PTTEL]=1)
4. Verify PTILx=1 for a connected external pullup device; read PTILx=0 for an open input
PTAL[PTAL1:PTAL0]=x, where x is 0, 1, 2, or 3)
PIRL=0 / PIRL=1
(Figure
HV Supply
Figure 2-49. Digital Input Read with Pulldown Enabled
Figure 2-48. Digital Input Read with Pullup Enabled
110K / 550K
2-49):
MC9S12VR Family Reference Manual, Rev. 2.2
Preliminary - Subject to Change Without Notice
PIRL=0 / PIRL=1
610K / 1050K
500K
HV Supply
40K
10K
10K
40K
VDDX
HVIx
HVIx
min. 1/10 * V
max. 10/11 * V
max. 21/22 * V
DDX
HVI
HVI
(PIRL=0)
(PIRL=1)
Digital in
Digital in
Port Integration Module (S12VRPIMV2)
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