Intel E3815 FH8065301567411 Data Sheet
Product codes
FH8065301567411
PCU – iLB – Real Time Clock (RTC)
Intel
®
Atom™ Processor E3800 Product Family
Datasheet
4547
36.4
References
Accessing the Real Time Clock Registers and the NMI Enable Bit:
36.5
Register Map
36.6
IO Mapped Registers
The RTC internal registers and RAM is organized as two banks of 128 bytes each, called
the standard and extended banks.
the standard and extended banks.
Note:
It is not possible to disable the extended bank.
The first 14 bytes of the standard bank contain the RTC time and date information
along with four registers, A - D, that are used for configuration of the RTC. The
extended bank contains a full 128 bytes of battery backed SRAM. All data movement
between the host CPU and the RTC is done through registers mapped to the standard I/
O space.
along with four registers, A - D, that are used for configuration of the RTC. The
extended bank contains a full 128 bytes of battery backed SRAM. All data movement
between the host CPU and the RTC is done through registers mapped to the standard I/
O space.
Note:
Registers reg_RTC_IR_type and reg_RTC_TR_type are used for data movement to and
from the standard bank. Registers reg_RTC_RIR_type and reg_RTC_RTR_type are used
for data movement to and from the extended bank. All of these registers have alias I/O
locations, as indicated in
from the standard bank. Registers reg_RTC_RIR_type and reg_RTC_RTR_type are used
for data movement to and from the extended bank. All of these registers have alias I/O
locations, as indicated in
.
36.7
Indexed Registers
The RTC contains indexed registers that are accessed via the reg_RTC_IR_type and
reg_RTC_TR_type registers.
reg_RTC_TR_type registers.
PM1_CNT.SLP_TYP
12:10
0b
GPE0a_EN.PME_B0_EN
13
0b
GPE0a_EN.BATLOW_EN
10
0b
Table 326. Register Bits Reset by ILB_RTC_RST# Assertion (Sheet 2 of 2)
Register Bit
Bit(s)
Default State
Table 327.
I/O Registers Alias Locations
Register
Original I/O Location
Alias I/O Location
reg_RTC_IR_type
70h
74h
reg_RTC_TR_type
71h
75h
reg_RTC_RIR_type
72h
76h
reg_RTC_RTR_type
73h
77h