Appendix A MCU Electrical Specifications
S12ZVHY/S12ZVHL Family Reference Manual Rev. 1.05
Freescale Semiconductor
777
A.1.2.4
TEST
This pin is used for production testing only. The TEST pin must be tied to ground in all applications.
A.1.3
Current Injection
Power supply must maintain regulation within operating VDDX or V
DD
range during instantaneous and
operating maximum current conditions.
shows a 5 V GPIO pad driver and the on chip voltage
regulator with VDDX output. It shows also the power and ground pins VSUP, VDDX, VSSX and VSSA.
Px represents any 5 V GPIO pin. Assume Px is configured as an input. The pad driver transistors P1 and
N1 are switched off (high impedance). If the voltage V
in
on Px is greater than V
DDX
a positive injection
current I
in
will flow through diode D1 into VDDX node. If this injection current I
in
is greater than I
Load
,
the internal power supply VDDX may go out of regulation. Ensure the external V
DDX
load will shunt
current greater than maximum injection current. This is the greatest risk when the MCU is not consuming
power; e.g., if no system clock is present, or if the clock rate is very low which would reduce overall power
consumption.
Figure A-1. Current Injection on GPIO Port if V
in
> V
DDX
V
BG
Pad Driver
VDDX
VSSX
VSSA
VSUP
V
in
> V
DDX
I
in
I
in
Voltage Regulator
D1
P1
N1
C
Load
I
SUP
I
Load
I
DDX
P2
Px
+
_
Содержание MC9S12ZVHL32
Страница 21: ...S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 Freescale Semiconductor 21 PAGE INTENTIONALLY LEFT BLANK...
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Страница 686: ...Chapter 20 ECC Generation module SRAM_ECCV1 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 686 Freescale Semiconductor...
Страница 752: ...Chapter 22 Supply Voltage Sensor BATSV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 752 Freescale Semiconductor...
Страница 774: ...Chapter 23 LIN Physical Layer S12LINPHYV2 S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 774 Freescale Semiconductor...
Страница 788: ...Appendix A MCU Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 788 Freescale Semiconductor...
Страница 794: ...Appendix B ADC Electricals S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 794 Freescale Semiconductor...
Страница 798: ...Appendix D IRC Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 798 Freescale Semiconductor...
Страница 802: ...Appendix F MSCAN Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 802 Freescale Semiconductor...
Страница 806: ...Appendix G NVM Electrical Parameters S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 806 Freescale Semiconductor...
Страница 810: ...Appendix H BATS Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 810 Freescale Semiconductor...
Страница 816: ...Appendix K OSC32K Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 816 Freescale Semiconductor...
Страница 822: ...Appendix L SPI Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 822 Freescale Semiconductor...
Страница 826: ...Appendix M LINPHY Electrical Specifications S12ZVHY S12ZVHL Family Reference Manual Rev 1 05 826 Freescale Semiconductor...
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