Siemens EF 88H Series Manual do Utilizador Página 27

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Semiconductor Group 4 - 2
Table 4-1, Status of all Pins During Hardware Power Down Mode
Pins Status Voltage Range at Pin During
HW-Power Down
P0, P1, P2, P3, P4,
P5, P6, P7, P8
Floating outputs /
Disabled input function
V
SS
V
IN
V
CC
EA active input V
IN
= V
CC
or V
IN
= V
SS
PE/SWD active input, Pull-up resistor disabled
during HW power down
V
IN
= V
CC
or V
IN
= V
SS
XTAL1 active output pin may not be driven
XTAL2 disabled input function
V
SS
V
IN
V
CC
PSEN, ALE Floating outputs /
Disabled input function
(for test modes only)
V
SS
V
IN
V
CC
VAREF, VAGND active supply pins V
AGnd
V
IN
V
CC
OWE active input; must be at high level for
start-up after HW PD; pull up resistor
disabled during HW-power down
V
IN
= V
CC
or
(
V
IN
= V
SS
)
Reset
active input; must be on high level if
HW PD is used
V
IN
= V
CC
R0 Floating output V
SS
V
IN
V
CC
System Reset
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