AN1241 Motorola Semiconductor Products, AN1241 Datasheet - Page 9

• Manufacturer Part Number: AN1241
• Description: Interfacing the Mc68hc705j1a to 9356/9366 Eeproms
• Manufacturer: Motorola Semiconductor Products

AN1241/D
J9356_WR_OP
ON SER_OUT
PUT BIT 7 OF
SHIFT LEFT
KICK THE
OPCODE
OPCODE
X = X-1
WDOG
X = 0?
RTS
X=3
YES
NO
Freescale Semiconductor, Inc.
For More Information On This Product,
J9356_RD_DATA
READ SER_IN
ROTATE LEFT
ROTATE LEFT
SHIFT LEFT ADDR
PUT IN C BIT
Go to: www.freescale.com
J9356_WR_ADDR
ON SER_OUT
PUT BIT 7 OF
DATA_H
DATA_L
X = X-1
X = 0?
X=16
RTS
OPCODE
X = X-1
X = 0?
RTS
X=8
YES
YES
NO
NO
SHIFT LEFT DATA_H
SHIFT LEFT DATA_L
J9356_WR_DATA
PUT BIT 7 OF
DATA_H ON
SER_OUT
X = X-1
X = 0?
X=16
RTS
J9356_WAIT
YES
SER_IN = 0?
KICK THE
EEPROM
WDOG
CS = 1
READY?
CS = 0
RTS
NO
NO
YES
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