EZ80F91AZ050EG Zilog, EZ80F91AZ050EG Datasheet - Page 277

• Manufacturer Part Number: EZ80F91AZ050EG
• Description: IC ACCLAIM MCU 256KB 144LQFP
• Manufacturer: Zilog
• Series: eZ80® Acclaim!®r

Specifications of EZ80F91AZ050EG

• Core Processor: Z8
• Core Size: 8-Bit
• Speed: 50MHz
• Connectivity: Ethernet, I²C, IrDA, SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, WDT
• Number Of I /o: 32
• Program Memory Size: 256KB (256K x 8)
• Program Memory Type: FLASH
• Ram Size: 16K x 8
• Voltage - Supply (vcc/vdd): 3 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 105°C
• Package / Case: 144-LQFP
• Processor Series: EZ80F91x
• Core: eZ80
• Data Bus Width: 8 bit
• Data Ram Size: 16 KB
• Interface Type: I2C, IrDA, SPI, UART
• Maximum Clock Frequency: 50 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 4
• Operating Supply Voltage: 3 V to 3.6 V
• Maximum Operating Temperature: + 105 C
• Mounting Style: SMD/SMT
• Development Tools By Supplier: eZ80F910300ZCOG
• Minimum Operating Temperature: - 40 C
• For Use With: 269-4712 - KIT DEV ENCORE 32 SERIES269-4671 - BOARD ZDOTS SBC Z80ACCLAIM PLUS269-4561 - KIT DEV FOR EZ80F91 W/C-COMPILER269-4560 - KIT DEV FOR EZ80F91 W/C-COMPILER
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Details
• Other names: 269-3867; EZ80F91AZ050EG

Table 152. PLL Divider Register—Low Bytes
PS019215-0910
Bit
Reset
CPU Access
Note: W = Write only.
Bit 
Position
[7:0]
PLL_DIV_L
Note:
Power Requirement to the Phase-Locked Loop Function
PLL Registers
Regardless of whether or not you chooses to use the PLL module block as a clock source
for the eZ80F91 device, the PLL_V
the PLL_V
eZ80F91 using any system clock source.
PLL Divider Control Register—Low and High Bytes
This register is designed such that the 11 bit divider value is loaded into the divider mod-
ule whenever the PLL_DIV_H register is written. Therefore, the procedure must be to
load the PLL_DIV_L register, followed by the PLL_DIV_H register, for the divider to
receive the appropriate value.
The divider is designed such that any divider value less than two is ignored; a value of two
is used in its place.
The LSB of PLL divider N is set via the corresponding bits in the PLL_DIV_L register.
See
The PLL divider register are written only when the PLL is disabled. A read-back of the
PLL Divider registers returns 0.
Value
00h–FFh These bits represent the Low byte of the 11 bit PLL divider
Table 152
SS
W
7
0
Description
value. The complete PLL divider value is returned by
{PLL_DIV_H, PLL_DIV_L}.
(pin 84) must be connected to a V
and
Table 153
W
6
0
W
5
0
on page 269.
DD
W
4
0
(PLL_DIV_L = 005Ch)
(pin 87) must be connected to a V
W
3
0
SS
supply for proper operation of the
W
2
0
W
1
1
Product Specification
W
0
0
Phase-Locked Loop
DD
eZ80F91 MCU
supply and
268