XC705B32CFNE Freescale Semiconductor, XC705B32CFNE Datasheet - Page 43

• Manufacturer Part Number: XC705B32CFNE
• Description: IC MCU 2.1MHZ 32K OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of XC705B32CFNE

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 2.1MHz
• Connectivity: SCI
• Peripherals: POR, WDT
• Number Of I /o: 32
• Program Memory Size: 32KB (32K x 8)
• Program Memory Type: OTP
• Eeprom Size: 256 x 8
• Ram Size: 528 x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b; D/A 2x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 52-PLCC
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

The MC68HC05B6 MCU is capable of addressing 8192 bytes of memory and registers with its
program counter. The memory map includes 5950 bytes of User ROM (including User vectors),
432 bytes of self check ROM, 176 bytes of RAM and 256 bytes of EEPROM.
3.1
All the I/O, control and status registers of the MC68HC05B6 are contained within the first 32-byte
block of the memory map, as shown in
Section 3.8
3.2
The user RAM comprises 176 bytes of memory, from $0050 to $00FF. This is shared with a 64
byte stack area. The stack begins at $00FF and may extend down to $00C0.
Note:
3.3
The User ROM consists of 5950 bytes of ROM mapped as follows:
•
•
•
MC68HC05B6
Rev. 4.1
48 bytes of page zero ROM from $0020 to $004F
5888 bytes of User ROM from $0800 to $1EFF
14 bytes of User vectors from $1FF2 to $1FFF
Using the stack area for data storage or temporary work locations requires care to prevent
the data from being overwritten due to stacking from an interrupt or subroutine call.
as this register contains bits which are relevant to several modules.
Registers
RAM
ROM
MEMORY AND REGISTERS
MEMORY AND REGISTERS
Figure
3
3-1. The miscellaneous register is shown in
Freescale
3-1
3