PIC18F6621-I/PTG Microchip Technology, PIC18F6621-I/PTG Datasheet - Page 78

• Manufacturer Part Number: PIC18F6621-I/PTG
• Description: IC PIC MCU FLASH 32KX16 64TQFP
• Manufacturer: Microchip Technology
• Series: PIC® 18Fr

Specifications of PIC18F6621-I/PTG

• Core Processor: PIC
• Core Size: 8-Bit
• Speed: 40MHz
• Connectivity: I²C, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, LVD, POR, PWM, WDT
• Number Of I /o: 53
• Program Memory Size: 64KB (32K x 16)
• Program Memory Type: FLASH
• Eeprom Size: 1K x 8
• Ram Size: 3.75K x 8
• Voltage - Supply (vcc/vdd): 4.2 V ~ 5.5 V
• Data Converters: A/D 12x10b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 64-TFQFP
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

PIC18F6525/6621/8525/8621
6.2.4
The presentation of control signals on the external
memory bus is different for the various operating
modes. Typical signal timing diagrams are shown in
Figure 6-4 through Figure 6-6.
FIGURE 6-4:
FIGURE 6-5:
DS39612B-page 76
AD<15:0>
A<19:16>
Instruction
Execution
AD<15:0>
A<19:16>
Memory
Cycle
Instruction
Execution
ALE
Memory
CE
OE
WRH
Apparent Q
WRL
Cycle
16-BIT MODE TIMING
BA0
ALE
OE
CE
Actual Q
‘1’
‘0’
‘1’
Q1
EXTERNAL MEMORY BUS TIMING FOR TBLRD
EXTERNAL MEMORY BUS TIMING FOR TBLRD (MICROPROCESSOR MODE)
(EXTENDED MICROCONTROLLER MODE)
Opcode Fetch
INST(PC – 2)
from 000100h
Q1
Q1
Q2
TBLRD*
3AABh
TBLRD Cycle 1
Opcode Fetch
from 007556h
Q2
Q2
Q3
MOVLW 55h
00h
Q4
Q3
Q3
0E55h
Q1
Q4
Q4
TBLRD Cycle 1
Opcode Fetch
from 000102h
MOVLW 55h
Q2
Q1
Q1
Q3
CF33h
Q2
Q2
Q4
Q3
Q3
Q1
TBLRD Cycle 2
from 199E67h
CF33h
Table Read
from 199E67h
TBLRD Cycle 2
TBLRD 92h
of 92h
Q2
Q4
Q4
0Ch
0Ch
Q3
Q4
Q1
9256h
9256h
Q4
Q4
Q2
1 T
 2005 Microchip Technology Inc.
Q1
CY
Wait
Opcode Fetch
from 000104h
Q4
Q3
ADDLW 55h
Q2
MOVLW
Q4
Q4
Q3
‘1’
‘1’
‘0’
Q4