HT9480 Datasheet, PDF (1/57 Pages) Holtek Semiconductor Inc – Pager Controller

HT9480
Pager Controller
Features
• _{Operating voltage: 2.2V~3.5V}
• _{Low power crystal oscillator control}
– _{512, 1200, or 2400 bps data rate operation}
• _{Decodes CCIR Radio-paging Code}
No.1 (POCSAG Code)
• _{2-bit random and optional 4-bit burst error}
correction
• _{Improved synchronization algorithm}
• _{Supports up to 6 independently program-}
mable user addresses and 6 user frames
• _{Three RF power on timing control pins}
• _{Single crystal for all available baud rate}
(76.8kHz crystal)
• _{Battery low indication (external detector)}
• _{Battery fail interrupt and data ready}
interrupt
• _{8K×16 program ROM}
• _{416×8 data RAM}
• _{35×4 LCD display}
• _{7 input lines and 10 bidirectional I/O lines}
• _{8-bit programmable timer for RTC}
interrupt
• _{8-bit programmable timer/event counter}
and overflow interrupt
• _{8-bit programmable tone generator with}
buzzer output
• _{Watchdog timer}
• _{Halt function and wake-up feature reduce}
power consumption
• _{63 powerful instructions, most instructions}
in one machine cycle
• _{Eight-level subroutine nesting}
• _{Table read instruction}
• _{Inverted or non-inverted input signal}
selection for decoder input
• _{80-pin LQFP package}
General Description
The HT9480 is a high performance pager con-
troller. The built-in single cycle instructions
(16-bit wide) and two-stage pipeline architec-
ture of the HT9480 account for its high perform-
ance. The controller contains a full function
pager decoder (POCSAG code) at 512, 1200, or
2400 bits per second data rate and an LCD
display driver with a 35×4 dot output.
1
23th Feb ’98