FDC37B787-NS Standard Microsystems (SMSC), FDC37B787-NS Datasheet - Page 189

• Manufacturer Part Number: FDC37B787-NS
• Manufacturer: Standard Microsystems (SMSC)

Specifications of FDC37B787-NS

• Pin Count: 128
• Lead Free Status / RoHS Status: Compliant

RTC, Logical Device 6
Note 1: The secondary base address must be set to a value other than 70h prior to selecting this option.
RTC Mode Register
Default = 0x00
on Vcc POR or
Reset_Drv
NAME
TABLE 81 - RTC, LOGICAL DEVICE 6 [LOGICAL DEVICE NUMBER = 0X06]
REG INDEX
0xF0 R/W
Bit[0] = 1 : Lock CMOS RAM 00-1Fh in Bank 1
Bit[1] = 1 : Lock CMOS RAM 20-3Fh in Bank 1
Bit[2] = 1 : Lock CMOS RAM 40-5Fh in Bank 1
Bit[3] = 1 : Lock CMOS RAM 60-7Fh in Bank 1
Bits[5:4] RTC Bank Selection
=00 Bank 1 at Secondary Base Address, Bank 0 Off
(Default)
=01 Bank 0 at 70h and Bank 1 at Secondary Base
Address
=10 No Bank Selected
=11 Bank 0 at 70h, Bank 1 Off
Bit[7:6] Reserved
Note: Once set, bits[3:0] can not be cleared by a
write; bits[3:0] are cleared only on Vcc Power On
Reset or upon a Hard Reset.
(Note 1)
192
DEFINITION
STATE
C