PIC18F4580-I/P Microchip Technology Inc., PIC18F4580-I/P Datasheet - Page 41

• Manufacturer Part Number: PIC18F4580-I/P
• Description: 40 PIN, 32 KB FLASH, 1536 RAM, 36 I/O
• Manufacturer: Microchip Technology Inc.

Specifications of PIC18F4580-I/P

• A/d Inputs: 11-Channel, 10-Bit
• Comparators: 2
• Cpu Speed: 10 MIPS
• Eeprom Memory: 256 Bytes
• Input Output: 36
• Interface: CAN/I2C/SPI/USART
• Memory Type: Flash
• Number Of Bits: 8
• Package Type: 40-pin PDIP
• Programmable Memory: 32K Bytes
• Ram Size: 1.5K Bytes
• Speed: 40 MHz
• Timers: 1-8 bit, 3-16 bit
• Voltage, Range: 2-5.5 V
• Lead Free Status / Rohs Status: RoHS Compliant part Electrostatic Device

REGISTER 4-1:
FIGURE 4-3:
 2004 Microchip Technology Inc.
bit 7
bit 6
bit 5
bit 4-0 SP4:SP0: Stack Pointer Location bits
Note 1: No RAM associated with this address; always maintained ‘0’s.
TOSU
00h
STKPTR: STACK POINTER REGISTER
RETURN ADDRESS STACK AND ASSOCIATED REGISTERS
bit 7
STKFUL: Stack Full Flag bit
1 = Stack became full or overflowed
0 = Stack has not become full or overflowed
STKUNF: Stack Underflow Flag bit
1 = Stack underflow occurred
0 = Stack underflow did not occur
Unimplemented: Read as ‘0’
Legend:
R = Readable bit
-n = Value at POR
STKFUL
R/C-0
Note:
Bit 7 and bit 6 need to be cleared following a stack underflow or a stack overflow.
TOSH
STKUNF
1Ah
R/C-0
Top-of-Stack
TOSL
34h
W = Writable bit
U-0
‘1’ = Bit is set
—
Return Address Stack
001A34h
000D58h
000000h
R/W-0
SP4
U = Unimplemented bit, read as ‘0’
‘0’ = Bit is cleared
11111
11110
11101
00011
00010
00001
00000
R/W-0
SP3
(1)
STKPTR<4:0>
R/W-0
00010
SP2
PIC18FXX8
C = Clearable bit
R/W-0
SP1
DS41159D-page 39
R/W-0
SP0
bit 0