MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 92

• 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

Memory Expansion and Chip-Select
8.7 Priority
Only one module or chip-select may be selected at a time. If more than one module shares a space, only
the highest priority module is selected.
Only one chip-select is active at any address. In the event that two or more chip-selects cover the same
address, only the highest priority chip-select is active.
Chip-selects have this order of priority:
92
1. External spaces can be accessed only if the MCU is in expanded mode. Priorities of differ-
Priority
Highest
Lowest
ent external spaces affect chip-selects and memory expansion.
Highest
CS3
On-chip register space — 512 bytes fully blocked for registers although some of
this space is unused
BDM space (internal) — When BDM is active, this 256-byte block of registers
and ROM appear at $FFxx; cannot overlap RAM or registers
On-chip RAM
On-chip EEPROM (if enabled, EEON = 1)
E space (external)
may be used with “extra” memory expansion and CS3
CS space (external)
be used with CS3–CS0
P space (external)
program memory expansion and CSP0 and/or CSP1
D space (external)
data memory expansion and CSD or CSP1 (if set for full memory space) or the
entire half of memory space $0000–$7FFF
Remaining external
CS2
MC68HC812A4 Data Sheet, Rev. 7
Table 8-5. Module Priorities
(1)
(1)
(1)
(1)
CS1
(1)
— 16 Kbytes fixed at $8000 to $BFFF; may be used with
— 1 Kbyte at either $0000 to $03FF or $0400 to $07FF;
— 4 Kbytes fixed at $7000 to $7FFF; may be used with
— 512 bytes following the 512-byte register space; may
Module or Space
CS0
CSP0
CSD
CSP1
Lowest
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