pc87591l National Semiconductor Corporation, pc87591l Datasheet - Page 65

• Manufacturer Part Number: pc87591l
• Description: Lpc Mobile Embedded Controllers
• Manufacturer: National Semiconductor Corporation

Revision 1.07
3.0 Power, Reset and Clocks
3.2
The PC87591x has several input reset types:
Unless otherwise noted, reset references throughout the PC87591x modules default to the following types:
V
Activated when either V
V
Activated when V
Warm reset
Activated on RESET1 input falling edge.
WATCHDOG and Debugger Interface resets:
— WATCHDOG reset
— Debugger Interface reset
Host Domain reset
This is divided into two sub-groups: Host Domain Hardware and Host Domain Software reset. Combinations consist-
ing of the flowing events are used to trigger these reset operations:
— RESET1 active
— When V
— On V
— A Software reset triggered by a write of 1 to bit 1 of SIOCF1 register in the SuperI/O Configuration registers; see
For V
For core domain functions and host-core interface functions: V
Debugger Interface reset and Software reset
For host domain functions: Host Domain reset
PP
CC
RESET SOURCES AND TYPES
Activated on request from the TWD module (WATCHDOG signal is asserted); see Section 4.10 on page 164.
Activated on request from the Debugger Interface module used during debug and flash updates; see Section 4.19
on page 248.
Section 6.1.8 on page 343
Power-Up reset (for V
Power-Up reset
PP
DD
retained functions: V
DD
power-up
is active, RESET2 is active
V
CC
IN
ZL
Analog Ground Plane
Analog
Power
(3.3V)
is powered up.
CC
C1
PP
or V
10-100
22
+
PP
F
supplied functions only)
VOUT0
VOUT3
L
Figure 11. PC87591x Power Supply Connection
BAT
VIN0
VIN9
1
Power-Up reset
0.1
C2
F
is powered up after both have been off.
H
(Continued)
DA0
DA3
AD0
AD9
AV
AGND
CC
PC87591x
KBSIN0
KBSIN7
GND
V
V
V
65
BAT
DD
CC
Suspend
Digital
Power
(3.3V)
KBVIN0
KBVIN7
C3 0.1
CC
Digital Ground Plane
Power-Up reset, Warm reset, WATCHDOG reset,
F
+
C4
C5
22
Power
(3.3V)
Digital
F
Host
0.1
F
+
C7
0.1
F
C6
22
F
Backup
Power
KBV
BAT
IN
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