XC68HC705B32CFN Freescale Semiconductor, XC68HC705B32CFN Datasheet - Page 29

• Manufacturer Part Number: XC68HC705B32CFN
• Description: IC MCU 2.1MHZ 32K OTP 52-PLCC
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of XC68HC705B32CFN

• 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: Contains lead / RoHS non-compliant

2.1
The MC68HC05B6 MCU has two modes of operation, namely single chip and self check modes.
Table 2-1
2.1.1
This is the normal operating mode of the MC68HC05B6. In this mode the device functions as a
self-contained microcomputer (MCU) with all on-board peripherals, including the three 8-bit I/O
ports and the 8-bit input-only port, available to the user. All address and data activity occurs within
the MCU.
MC68HC05B6
Rev. 4.1
shows the conditions required to enter each mode on the rising edge of RESET.
MODES OF OPERATION AND PIN
Modes of operation
Single chip mode
V
IRQ pin
SS
2V
2V
MODES OF OPERATION AND PIN DESCRIPTIONS
to V
DD
DD
DD
Table 2-1 Mode of operation selection
TCAP1 pin
V
SS
DESCRIPTIONS
V
V
to V
DD
DD
DD
PD3
X
1
1
2
PD4
X
0
1
Single chip
Serial RAM loader
Jump to any address
Mode
Freescale
2-1
2