MC812A4CPVE8 Freescale Semiconductor, MC812A4CPVE8 Datasheet - Page 89

• 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 Chip-Select Registers
This section describes the chip-select registers.
8.6.1 Chip-Select Control Register 0
Read: Anytime
Write: Anytime
Bits have no effect on the associated pin in single-chip modes.
CSP1E — Chip-Select Program 1 Enable Bit
CSP0E — Chip-Select Program 0 Enable Bit
CSDE — Chip-Select Data Enable Bit
CS3E — Chip-Select 3 Enable Bit
CS2E — Chip-Select 2 Enable Bit
CS1E — Chip-Select 1 Enable Bit
Freescale Semiconductor
This bit effectively selects the holes in the memory map. It can be used in conjunction with CSP0 to
select between two 2-Mbyte devices based on address ADDR21.
CS2 and CS3 have a higher precedence and can override CS1 for a portion of this space.
1 = Enables this chip-select which covers the space $8000 to $FFFF or full map $0000 to $FFFF
0 = Disables this chip-select
1 = Enables this chip-select which covers the program space $8000 to $FFFF
0 = Disables this chip-select
1 = Enables this chip-select which covers either $0000 to $7FFF (CSDHF = 1) or $7000 to $7FFF
0 = Disables this chip-select
1 = Enables this chip-select which covers a 128-byte space following the register space
0 = Disables this chip-select
1 = Enables this chip-select which covers a 128-byte space following the register space
0 = Disables this chip-select
1 = Enables this chip-select which covers a 256-byte space following the register space
0 = Disables this chip-select
(CSDHF = 0)
($x280–$x2FF or $xA80–$xAFF) Alternately, it can be active for accesses within the extra page
window.
($x380–$x3FF or $xB80–$xBFF)
($x300–$x3FF or $xB00–$xBFF)
Address: $003C
Reset:
Read:
Write:
Bit 7
Figure 8-16. Chip-Select Control Register 0 (CSCTL0)
0
0
= Unimplemented
CSP1E
6
0
MC68HC812A4 Data Sheet, Rev. 7
CSP0E
5
1
CSDE
4
0
CS3E
3
0
CS2E
2
0
CS1E
1
0
Chip-Select Registers
CS0E
Bit 0
0
89