MC68HC705SR3CP Freescale Semiconductor, MC68HC705SR3CP Datasheet - Page 75

• Manufacturer Part Number: MC68HC705SR3CP
• Description: IC MCU 3.75K 2.1MHZ OTP 40-DIP
• Manufacturer: Freescale Semiconductor
• Series: HC05r

Specifications of MC68HC705SR3CP

• Core Processor: HC05
• Core Size: 8-Bit
• Speed: 4MHz
• Peripherals: LED, POR
• Number Of I /o: 32
• Program Memory Size: 3.75KB (3.75K x 8)
• Program Memory Type: OTP
• Ram Size: 192 x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 5.5 V
• Data Converters: A/D 4x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Connectivity: -

10.3
The Bootstrap mode is provided in the EPROM part (MC68HC705SR3) as a mean of
self-programming its EPROM with minimal circuitry. Bootstrap mode will be entered on the rising
edge of RESET when the V
mode, PB1 can then be used for other purposes. After entering the bootstrap mode, CPU
branches to the bootstrap program and carries out the EPROM programming routine. The user
EPROM consists of 3840 bytes, from location $1000 to $1EFF.
Refer to Appendix A for further details on MC68HC705SR3.
MC68HC05SR3
Bootstrap Mode
1=LED on, 0=LED off
D4
1
1
1
1
1
1
1
0
PP
pin is at V
D3
1
1
1
1
0
0
0
1
Flashing
Table 10-2 Self-Check Report
OPERATING MODES
D2
1
1
0
0
1
1
0
1
TST
(2
D1
1
0
1
0
1
0
0
1
×
V
DD
) and PB1 pin is at V
O.K. (self-check is on-going)
REMARKS
Bad port A
Bad port B
Bad port C
Bad port D
Bad ROM
Bad RAM
Bad SWI
Bad IRQ
DD
. Once in the bootstrap
Freescale
TPG
10-3
10