Topfield TF4000FI, Service Manual, Page: 22 / 62

IBM39STBx25xx
Preliminary STBx25xx Digital Set-Top Box Integrated Controllers
Stbx25_Overview.fm.02
May 31, 2002- IBM Confidential Product Overview
Page 43 of 890
1.6.4.10 Real Time Clock / Front Panel Controller
The Real Time Clock (RTC) counts seconds, minutes, hours, and days. Programmable alarms can be set to
interrupt the CPU, allowing the CPU to wake up when required to perform functions such as programming a
VCR. The RTC also provides a 3-wire front panel control interface, to drive panel seven-segment displays
with time information or program-generated data.
1.7 Signal and I/O Information
1.7.1 Signals Sorted by Signal Name
Table 1-1. Signals Sorted by Signal Name
I/O Signal Name Ball Number
27MHZ_CLK AA12
AUD_GNDA0 AA8
AUD_GNDA1 AC3
AUD_VDDA0 AC7
AUD_VDDA1 AA5
BI_ADDRESS11 W21
BI_ADDRESS12 Y23
BI_ADDRESS13 V20
BI_ADDRESS14 W22
BI_ADDRESS15 W23
BI_ADDRESS16 V21
BI_ADDRESS17 V22
BI_ADDRESS18 U21
BI_ADDRESS19 U22
BI_ADDRESS20 U23
BI_ADDRESS21 T21
BI_ADDRESS22 P20
BI_ADDRESS23 R23
BI_ADDRESS24 P21
BI_ADDRESS25 P22
BI_ADDRESS26 N21
BI_ADDRESS27 N22
BI_ADDRESS28 N23
BI_ADDRESS29 M21
BI_ADDRESS30 M22
BI_ADDRESS31_WBE1 M23
PLB