DS80CH11 Datasheet, PDF (7/88 Pages) Dallas Semiconductor – System Energy Manager

DS80CH11
1.2 DETAILED FEATURE SUMMARY
• High Speed 80C32 Compatible Core:
– High performance 4 clocks / machine cycle
(8032 = 12)
– Low Power: typically 1/3 power for equivalent
8032 throughput
– Maximum clock speed up to 25 MHz at 5.0V
– Ultra–low stop mode power (typ. 1 uA) and
“IDLE” mode (typ. 10 mA)
– Multiple wake–up sources from STOP including
key scan, 2–wire, host I/F, or external interrupt
– Three 16–bit timers, 1 serial port
– 256 byte scratchpad
– 256 bytes MOVX RAM
• Keyboard Control:
– Replaces 8042 and key scan microcontroller
– 2 Parallel I/O ports for key scan outputs
– One interrupt–driven 8–bit input port to initiate
key–scan sequence
• Input/Output:
– Total of eleven 8–bit I/O ports; all pins can be
individually programmed to serve as general
purpose digital input/output.
– Each 8–bit port supports one or more special
functions:
Port 0, 2, 3: External program / data memory
interface
Port 1, 3: UART, 2–Wire serial, timers, and
external interrupt I/O.
Port 4, 8, 9: Key scan input / output
Port 5: A/D inputs
Port 6: PWM Outputs
Port 7: Activity monitor, LED Control
Port 10: GPIO
• Analog Input/Output:
– Eight–channel, 10–bit A/D with power down
mode supports charging NiMH rechargeable
cells
– 4–channel, 8–bit PWM supports LCD brightness
and contrast control
• 2–Wire Bi–directional Serial Buses
– Master/slave multi–drop operation
– Manages on–board slaves or external I/O
devices
• Power Control
– Generates system power on reset
– Programmable power down pin states
1.3 CONVENTIONS
The following conventions are used throughout this
specification:
• “SEM” is the short form name used to indicate the
System Energy Manager.
• Signals that are active low are followed by a pound
symbol (#) or backslash (\), or are indicated with an
overbar.
• If a range of signals is described, such as SA0 through
SA10, the range is given as SA10–0, with the most–
significant digit first and the least–significant digit last,
separated by a hyphen.
• Numbers written in this specification can be written as
decimal, hexadecimal, or binary. Hexadecimal num-
bers are followed by an “H” suffix. Binary numbers are
followed by a “B” suffix. For example, decimal
27 = 1BH = 00011011B.
1.4 ADDITIONAL REFERENCES
The SEM incorporates the Dallas 8051 compatible High
Speed Micro core including the CPU and many of its
core peripherals. The operational details of these ele-
ments are contained in the Dallas High Speed Micro
User’s Guide.
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