MC68HC705X32CFU Freescale Semiconductor, MC68HC705X32CFU Datasheet - Page 26

• Manufacturer Part Number: MC68HC705X32CFU
• Manufacturer: Freescale Semiconductor

Specifications of MC68HC705X32CFU

• Cpu Family: HC05
• Device Core Size: 8b
• Frequency (max): 4MHz
• Interface Type: SCI
• Program Memory Type: EPROM
• Program Memory Size: 32KB
• Total Internal Ram Size: 528Byte
• # I/os (max): 32
• Number Of Timers - General Purpose: 1
• Operating Supply Voltage (typ): 5V
• Operating Supply Voltage (max): 5.5V
• Operating Supply Voltage (min): 4.5V
• On-chip Adc: 8-chx8-bit
• Instruction Set Architecture: CISC
• Operating Temp Range: -40C to 85C
• Operating Temperature Classification: Industrial
• Mounting: Surface Mount
• Pin Count: 64
• Package Type: PQFP
• Lead Free Status / Rohs Status: Supplier Unconfirmed

2
2.1.2
To place the part in bootstrap mode, the following conditions must be met during transition of the
RESET pin from low to high:
PD4 and PD3 are connected according to the values given in
function from the following three functions:
•
•
•
If the SEC bit in the option register is set, on first entering bootstrap mode the RAM and the EEPROM
are completely erased. The option register which contains the security bit is erased last, before any
program can be executed. The bootstrap software is implemented in the following locations:
•
•
Execute serial RAM loader program
Jump to RAM + 1
Jump to any address
RAM load and execute from $03B0 to $03FD
Vectors and program select from $7F80 to $7FEF
Motorola use.
Reserved for
1) IRQ pin at 2xV
2) TCAP1 pin at V
3) TCAP2 pin at V
NO
Bootstrap mode
Freescale Semiconductor, Inc.
Figure 2-1 Bootstrap mode function selection flow chart
PD4 set
MODES OF OPERATION AND PIN DESCRIPTIONS
?
DD
For More Information On This Product,
DD
SS
OR MDS pin at V
defined by ports A, B
Jump to address
Go to: www.freescale.com
and C.
NO
YES
SEC bit active?
PD3 set
ENTRY
DD
?
NO
Jump to RAM + 1.
NO
YES
YES
Table 2-1
Save PD in RAM. Erase
whole EEPROM + RAM
and check EPROM +
PD4 set
SEC bit.
?
to select the device’s
Serial RAM bootstrap
MC68HC05X16
loader.
YES
Rev. 1