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28-Pin Demo Board I 2 C? Demonstration Firmware
TABLE B-4:
TABLE B-4 EXECUTIVE (EXEC) WORD ADDRESSES
REG
0x00
0x01
0x02
0x03
0x04
0x05
0x06
0x07
NAME
EXEC_STATE
EXEC_ADC_CH0
EXEC_RTC_SECS
EXEC_STATUS
EXEC_04
EXEC_05
EXEC_06
EXEC_VERSION
DESCRIPTION
State of executive state controller
bit 7 == 1: force state controller to one of eight “entry
points” specified by bits[2:0]
ADC results of CHANNEL AN0 (potentiometer RP1)
binary value representation of RTC “SECONDS”
state of communications connector pins:
bit 0: PIN 1 (AUX1)
bit 1: PIN 4 (SDA)
bit 2: PIN 5 (SCL)
bit 3: PIN 6 (AUX2)
bits[5:4]: undefined
bit 6: operation error
bit 7: operation busy
undefined (can be read/written with no operational effect)
undefined (can be read/written with no operational effect)
undefined (can be read/written with no operational effect)
Firmware version number
State Controller – The Executive state controller manages background functions. The
HOST enacts a function by writing to EXEC_STATE with a valid “state entry value” (i.e.,
0x80-0x87). Writing values outside this range will cause unknown results.
TABLE B-5:
EXEC STATE ENTRY VALUES
VALUE
0x80
0x81
0x82
0x83
0x84
0x85
0x86
0x87
? 2007 Microchip Technology Inc.
NAME
EXEC_DISPLAY_PING_PONG
EXEC_TIMER1_TEST
EXEC_DISPLAY_ADC
EXEC_DISPLAY_RTC
EXEC_DISPLAY_PKSI
EXEC_DISPLAY_RESET
EXEC_DISPLAY_1SEC
EXEC_0x87
DESCRIPTION
display PING-PONG LED pattern:
DS1,2,3,4,3,2,1,2 ...
operation: timer1 test
display of Most Significant 4 bits of ADC
results measuring variable resistor
display of RTC SECONDS (binary) – 0-15
display of state of communications connector
pins:
LED1: PIN 1 (AUX1)
LED2: PIN 4 (SDA)
LED3: PIN 5 (SCA)
LED4: PIN 6 (AUX2)
display ‘RESET’ sequence
display – blink all LEDs – 1 sec ON, 1 sec
OFF, ...
undefined
DS51647A-page 111
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