EZ80L92AZ050SG Zilog, EZ80L92AZ050SG Datasheet - Page 96

• Manufacturer Part Number: EZ80L92AZ050SG
• Description: IC WEBSERVER 50MHZ 100LQFP
• Manufacturer: Zilog

Specifications of EZ80L92AZ050SG

• Processor Type: eZ80
• Features: High Speed, Single-Cycle Instruction-Fetch
• Speed: 50MHz
• Voltage: 3.3V
• Mounting Type: Surface Mount
• Package / Case: 100-LQFP
• Processor Series: EZ80L92x
• Core: eZ80
• Data Bus Width: 8 bit
• Program Memory Size: 64 KB
• Interface Type: I2C, SPI, UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 6
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 70 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: eZ80L920210ZCO
• Minimum Operating Temperature: 0 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 269-3878; EZ80L92AZ050SG

PS013014-0107
Real Time Clock Registers
The real time clock registers are accessed via the address and data bus using I/O
instructions. RTC_UNLOCK controls access to the RTC count registers. When unlocked
(RTC_UNLOCK = 1), the RTC count is disabled and the count registers are Read/Write.
When locked (RTC_UNLOCK = 0), the RTC count is enabled and the count registers are
Read-Only. The default, at RESET, is for the RTC to be locked.
Real Time Clock Seconds Register
This register contains the current seconds count. The value in the RTC_SEC register is
unchanged by a RESET. The current setting of BCD_EN determines whether the values in
this register are binary (BCD_EN = 0) or binary-coded decimal (BCD_EN = 1). Access to
this register is Read-Only if the RTC is locked and Read/Write if the RTC is unlocked.
See
Table 38. Real Time Clock Seconds Register (RTC_SEC = 00E0h)
Bit
Reset
CPU Access
Note: X = Unchanged by RESET; R/W* = Read-only if RTC locked, Read/Write if RTC unlocked.
Binary-Coded-Decimal Operation (BCD_EN = 1)
Bit
Position
[7:4]
TEN_SEC
[3:0]
SEC
Binary Operation (BCD_EN = 0)
Bit
Position
[7:0]
SEC
Table
38.
Value Description
0–5
0–9
Value
00h–3Bh The current seconds count.
R/W*
The tens digit of the current seconds count.
The ones digit of the current seconds count.
X
7
Description
R/W*
X
6
R/W*
X
5
R/W*
X
4
R/W*
X
3
Product Specification
R/W*
X
2
R/W*
Real Time Clock
X
1
R/W*
X
0
90