TX4939XBG-400 Toshiba, TX4939XBG-400 Datasheet - Page 245

• Manufacturer Part Number: TX4939XBG-400
• Manufacturer: Toshiba

Specifications of TX4939XBG-400

• Cpu Core: TX49/H4 90nm
• Clock Mhz/max Mips: 400/520
• Inst./data Cache: 32KB (4 Way)/32KB (4 Way)
• Tlb: x
• 1cycle Mac: x
• Volts (v): 1.25/2.5/3.3
• Peripherals: DDR, NAND, ATA, ETHERNET, SECURITY, FPU, MMU, SPI, I2S, I2C, PCI, VIDEO, UART, TIMER, RTC
• Companion Chip: TC86C001FG
• Package: PGBA456

RTC
11.1.
Diagram below shows the overall structure of the TX4939 Real Time Clock.
Rev. 3.1 November 1, 2005
Feature of Real Time Clock Module (RTC)
32,768Hz
3.0V Bat.
COUT
X’tal
CIN
C1
C2
D1
ALARM*
RTCVDD
X32OUT
D2
X32IN
3.3V digital Power
VDDR(1.0V~1.5V)
Figure 11-1 RTC Block Diagram
Regulator
Voltage
32K OSC
Ground (common)
11-1
Chapter 11. Real Time Clock
alarm
VDDR
X32K
RTC Independent Voltage Region
47 bit (6 Bytes) temporary buffer
32 bits (4Bytes) Alarm Register
RTC 47 bit binary counter
Alarm Detector Circuit
250 Bytes CMOS RAM
8-bit
Asynchronous R/W access
Toshiba RISC Processor
8-bit
TX4939
11
11
11
11