MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 91

• Manufacturer Part Number: MC812A4CPVE8
• Description: IC MCU 16BIT EEPROM 4K 112-LQFP
• Manufacturer: Freescale Semiconductor
• Series: HC12r

Specifications of MC812A4CPVE8

• Core Processor: CPU12
• Core Size: 16-Bit
• Speed: 8MHz
• Connectivity: SCI, SPI
• Peripherals: POR, WDT
• Number Of I /o: 83
• Program Memory Size: 4KB (4K x 8)
• Program Memory Type: EEPROM
• Ram Size: 1K x 8
• Voltage - Supply (vcc/vdd): 4.5 V ~ 5.5 V
• Data Converters: A/D 8x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 112-LQFP
• Processor Series: HC812A
• Core: HC12
• Data Bus Width: 16 bit
• Data Ram Size: 1 KB
• Interface Type: SCI, SPI
• Maximum Clock Frequency: 8 MHz
• Number Of Programmable I/os: 91
• Number Of Timers: 8
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit, 8 Channel
• Controller Family/series: 68HC12
• No. Of I/o's: 91
• Eeprom Memory Size: 4KB
• Ram Memory Size: 1KB
• Cpu Speed: 8MHz
• No. Of Timers: 1
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: Details

8.6.3 Chip-Select Stretch Registers
Each of the seven chip-selects has a 2-bit field in this register which determines the amount of clock
stretch for accesses in that chip-select space.
Read: Anytime
Write: Anytime
Freescale Semiconductor
Address: $003E
Address: $003F
Reset:
Reset:
Read:
Read:
Write:
Write:
STR3A
Bit 7
Bit 7
Figure 8-18. Chip-Select Stretch Register 0 (CSSTR0)
Figure 8-19. Chip-Select Stretch Register 1 (CSSTR1)
0
0
0
Stretch Bit
SxxxA
= Unimplemented
0
0
1
1
STR3B
6
0
0
6
0
Table 8-4. Stretch Bit Definition
MC68HC812A4 Data Sheet, Rev. 7
SRP1A
STR2A
5
1
5
1
Stretch Bit
SxxxB
SRP1B
STR2B
0
1
0
1
4
1
4
1
SRP0A
STR1A
3
1
3
1
Number of E-Clocks
SRP0B
STR1B
Stretched
2
1
2
1
0
1
2
3
STRDA
STR0A
1
1
1
1
STRDB
Chip-Select Registers
STR0B
Bit 0
Bit 0
1
1
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