PIC17C752 MICROCHIP [Microchip Technology], PIC17C752 Datasheet - Page 77

• Manufacturer Part Number: PIC17C752
• Description: High-Performance 8-Bit CMOS EPROM Microcontrollers
• Manufacturer: MICROCHIP [Microchip Technology]

FIGURE 10-12: BLOCK DIAGRAM OF RE3/CAP4 PORT PIN
TABLE 10-9:
TABLE 10-10: REGISTERS/BITS ASSOCIATED WITH PORTE
Address
Name
RE0/ALE
RE1/OE
RE2/WR
RE3/CAP4
Legend: TTL = TTL input.
15h, Bank 1
14h, Bank 1
14h, Bank 7
15h, Bank 7
16h, Bank 7
Legend: x = unknown, u = unchanged, - = unimplemented read as '0'. Shaded cells are not used by PORTE.
Note 1:
Note: I/O pin has protection diodes to V
1997 Microchip Technology Inc.
Other (non power-up) resets include: external reset through MCLR and the Watchdog Timer Reset.
V
N
Name
PORTE
DDRE
CA4L
CA4H
TCON3
P
DD
PORTE FUNCTIONS
bit0
bit1
bit2
bit3
Data direction register for PORTE
Capture4 low byte
Capture4 high byte
Bit
Bit 7
—
—
Buffer Type
CA4OVF
ST = Schmitt Trigger input
Bit 6
DD
—
TTL
TTL
TTL
and Vss.
ST
Port
Data
CA3OVF
Bit 5
—
EN
D
Input/Output or system bus Address Latch Enable (ALE) control pin.
Input/Output or system bus Output Enable (OE) control pin.
Input/Output or system bus Write (WR) control pin.
Input/Output or Capture4 input pin
EN
Q
Q
Q
Q
CA4ED1
Bit 4
Preliminary
—
Q
CK
CK
S
D
D
RE3/CAP4
CA4ED0
Bit 3
RE2/WR
CA3ED1
Bit 2
Function
CA3ED0 PWM3ON
RE1/OE
Bit 1
RE0/ALE
Bit 0
WR_PORTE
Peripheral In
RD_PORTE
WR_DDRE
RD_DDRE
Data Bus
---- xxxx
---- 1111
xxxx xxxx
xxxx xxxx
-000 0000
Value on,
POR,
BOR
DS30264A-page 77
other resets
Value on all
---- uuuu
---- 1111
uuuu uuuu
uuuu uuuu
-000 0000
(Note1)