PIC16C774/P Microchip Technology, PIC16C774/P Datasheet - Page 11

• Manufacturer Part Number: PIC16C774/P
• Description: IC MCU OTP 4KX14 A/D PWM 40DIP
• Manufacturer: Microchip Technology
• Series: PIC® 16Cr

Specifications of PIC16C774/P

• Core Size: 8-Bit
• Program Memory Size: 7KB (4K x 14)
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Core Processor: PIC
• Speed: 20MHz
• Connectivity: I²C, SPI, UART/USART
• Number Of I /o: 33
• Program Memory Type: OTP
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 4 V ~ 5.5 V
• Data Converters: A/D 10x12b
• Oscillator Type: External
• Operating Temperature: 0°C ~ 70°C
• Package / Case: 40-DIP (0.600", 15.24mm)
• Controller Family/series: PIC16C
• No. Of I/o's: 33
• Ram Memory Size: 256Byte
• Cpu Speed: 20MHz
• No. Of Timers: 3
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: ISPICR1 - ADAPTER IN-CIRCUIT PROGRAMMING444-1001 - DEMO BOARD FOR PICMICRO MCU
• Eeprom Size: -
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: PIC16C774-04/P; PIC16C774-20/P

8.
REGISTER 1:
 2001 Microchip Technology Inc.
Note:
The A/D clock source bits (ADCS1:ADCS0)
have had their operation modified.
Register 1 for a new definition of the ADCS1 and
ADCS0 bits.
Figure 1 shows how the T
based upon the selection of the ADCS<1:0> bits
and the source of V
or V
ence (VRH or VRL), then the required T
increased by a factor of eight (see electrical spec-
ification parameter #130A).
The clock source selected by the ADCS<1:0> bits
is divided by eight when an internally generated
reference voltage is used as reference to the A/D
module. This automatically addresses the require-
ment for the T
reference is used as the A/D voltage reference.
REF
bit 7-6
bit 5-0
Electrical specification parameter #130A is
currently specified in the clarifications and
corrections section of the Device Errata
Sheet.
- comes from the internal voltage refer-
AD
time, when the internal voltage
A/D CONTROL REGISTER 0 (ADCON0)
ADCS<1:0>: A/D Conversion Clock Select bits
No change to the operation of these bits
bit 7
Legend:
R = Readable bit
- n = Value at POR
REF
ADCS1
R/W-0
ADCS<1:0>
+ and V
AD
00
01
10
11
time is determined
REF
ADCS0
R/W-0
-. When V
AD
When VCFG<2:0> = 000, 001,
time is
See
R/W-0
CHS2
REF
W = Writable bit
’1’ = Bit is set
+
(1 MHz max)
011 or 101
32 T
A/D RC
2 T
8 T
R/W-0
CHS1
OSC
OSC
OSC
FIGURE 1:
A/D Clock Source (T
Oscillator
A/D RC
Table 7 shows the maximum device frequency
depending on the A/D clock source selected.
F
F
F
OSC
OSC
OSC
R/W-0
CHS0
/2
/8
/32
U = Unimplemented bit, read as ‘0’
’0’ = Bit is cleared
ADCS<1:0>
V
V
V
REF
REF
REF
00
01
10
11
+ = VRH
+ = VRL
- = VRL
A/D CLOCK SOURCE
BLOCK DIAGRAM
GO/DONE
When VCFG<2:0> = 010, 100,
R/W-0
÷8
AD
PIC16C774
) =
(125 kHz max)
110 or 111
256 T
x = Bit is unknown
16 T
64 T
A/D RC
0
1
R/W-0
CHS3
T
AD
DS80062D-page 11
OSC
OSC
OSC
Converter
A/D
ADON
R/W-0
bit 0