Справочник Пользователя для Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256
Модели
DEMO9S12XHY256
Electrical Characteristics
MC9S12XHY-Family Reference Manual, Rev. 1.04
744
Freescale Semiconductor
A.5
Output Loads
A.5.1
Resistive Loads
The voltage regulator is intended to supply the internal logic and oscillator. It allows no external DC loads.
A.5.2
Capacitive Loads
The capacitive loads are specified in
. Ceramic capacitors with X7R dielectricum are required.
A.5.3
Chip Power-up and Voltage Drops
LVI (low voltage interrupt), POR (power-on reset) and LVRs (low voltage reset) handle chip power-up or
drops of the supply voltage. Their function is shown in
drops of the supply voltage. Their function is shown in
Figure A-2. 9S12XHY family - Chip Power-up and Voltage Drops (not scaled)
Table A-19. 9S12XHY family - Capacitive Loads
Num
Characteristic
Symbol
Min
Recommended
Max
Unit
1
VDD/VDDF external capacitive load
C
DDext
176
220
264
nF
3
VDDPLL external capacitive load
C
DDPLLext
80
220
264
nF
V
LVID
V
LVIA
V
LVRXD
V
LVRXA
V
PORD
LVI
POR
LVRX
t
V
V
DDX
LVI enabled
LVI disabled due to LVR
V
DD