C8051F333-GM Silicon Laboratories Inc, C8051F333-GM Datasheet - Page 107
![IC 8051 MCU 4KB FLASH 20QFN](/photos/12/15/121597/c8051f333-gm_sml.jpg)
C8051F333-GM
Manufacturer Part Number
C8051F333-GM
Description
IC 8051 MCU 4KB FLASH 20QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F33xr
Specifications of C8051F333-GM
Program Memory Type
FLASH
Program Memory Size
4KB (4K x 8)
Package / Case
20-QFN
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, WDT
Number Of I /o
17
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
I2C/SMBus/SPI/UART
Maximum Clock Frequency
25 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Operating Supply Voltage
2.7 V to 3.6 V
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F330DK
Minimum Operating Temperature
- 40 C
On-chip Adc
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1451 - ADAPTER PROGRAM TOOLSTICK F330
Eeprom Size
-
Data Converters
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1267
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
C8051F333-GMR
Manufacturer:
SILICON LABS/芯科
Quantity:
20 000
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- Download datasheet (2Mb)
12. External RAM
The C8051F330/1/2/3/4/5 devices include 512 bytes of RAM mapped into the external data memory
space. All of these address locations may be accessed using the external move instruction (MOVX) and
the data pointer (DPTR), or using MOVX indirect addressing mode. If the MOVX instruction is used with an
8-bit address operand (such as @R1), then the high byte of the 16-bit address is provided by the External
Memory Interface Control Register (EMI0CN as shown in SFR Definition 12.1). Note: the MOVX instruction
is also used for writes to the Flash memory. See
The MOVX instruction accesses XRAM by default.
For a 16-bit MOVX operation (@DPTR), the upper 7 bits of the 16-bit external data memory address word
are "don't cares". As a result, the 512-byte RAM is mapped modulo style over the entire 64 k external data
memory address range. For example, the XRAM byte at address 0x0000 is shadowed at addresses
0x0200, 0x0400, 0x0600, 0x0800, etc. This is a useful feature when performing a linear memory fill, as the
address pointer doesn't have to be reset when reaching the RAM block boundary.
Bits7–1: UNUSED. Read = 0000000b. Write = don’t care.
Bit 0:
R/W
Bit7
—
SFR Definition 12.1. EMI0CN: External Memory Interface Control
PGSEL: XRAM Page Select.
The EMI0CN register provides the high byte of the 16-bit external data memory address
when using an 8-bit MOVX command, effectively selecting a 256-byte page of RAM. Since
the upper (unused) bits of the register are always zero, the PGSEL determines which page
of XRAM is accessed.
For Example: If EMI0CN = 0x01, addresses 0x0100 through 0x01FF will be accessed.
R/W
Bit6
—
R/W
Bit5
—
R/W
Bit4
—
Rev. 1.7
Section “11. Flash Memory” on page 103
R/W
Bit3
—
R/W
Bit2
—
C8051F330/1/2/3/4/5
R/W
Bit1
—
SFR Address:
PGSEL
R/W
Bit0
0xAA
00000000
Reset Value
for details.
111
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