Intel J1850 FH8065301455200 User Manual

1210

Datasheet

The processor contains a Motorola MC146818B-compatible real-time clock with 242 
bytes of battery-backed RAM. The real-time clock performs twos key functions—
keeping track of the time of day and storing system data, even when the system is 
powered down. The RTC operates on a 32.768 kHz crystal and a 3.3 V battery.

The RTC supports two lockable memory ranges. By setting bits in the configuration 
space, two 8-byte ranges can be locked to read and write accesses. This prevents 
unauthorized reading of passwords or other system security information.

The RTC supports a date alarm that allows for scheduling a wake up event up to 30 
days in advance.

Please see 

 for additional details.

The signal description table has the following headings:

•

Signal Name: The name of the signal/pin

•

Direction: The buffer direction can be either input, output, or I/O (bidirectional)

•

Type: The buffer type found in 

•

Description: A brief explanation of the signal’s function

I

O

I

O

I

O

I

O

I

O

I

O

I

O

O

Platform Control Unit

UA
R

T

LP

C

GPI
O

RT
C

HP
ET

82
59

API
C

82
54

SMB

iLB

SP
I

PMC

ILB_RTC_X1

I

Analog

Crystal Input 1: This signal is connected to the 32.768 kHz crystal. If 

no external crystal is used, the signal can be driven with the desired 

clock rate.