EZ80F91AZ050EG Zilog, EZ80F91AZ050EG Datasheet - Page 105

• 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

PS019215-0910
MBIST Control
There are two Memory Built-In Self-Test (MBIST) controllers for the RAM blocks on the
eZ80F91. MBIST_GPR is for General-Purpose RAM and MBIST_EMR is for EMAC
RAM. Writing a 1 to MBIST_ON starts the MBIST testing. Writing a 0 to MBIST_ON
stops the MBIST testing. On completion of the MBIST testing, MBIST_ON is
automatically reset to 0. If RAM passes MBIST testing, MBIST_PASS is 1. The value in
MBIST_PASS is only valid when MBIST_DONE is High. See
Table 34. MBIST Control Register
Bit
Reset
CPU Access
Note: R/W = Read/Write; R = Read Only.
Bit Position
7
MBIST_ON
6
MBIST_DONE
5
MBIST_PASS
[4:0]
Value
0
1
0
1
0
1
00000
R/W
7
0
Description
MBIST Testing of the RAM is disabled.
MBIST Testing of the RAM is enabled.
MBIST Testing has not completed.
MBIST Testing has completed.
MBIST Testing has failed.
MBIST Testing has passed.
Reserved.
R
6
0
(MBIST_GPR = 00B6h, MBIST_EMR = 00B7h)
R
5
0
R
4
0
R
3
0
Table
Product Specification
Random Access Memory
R
2
0
34.
eZ80F91 MCU
R
1
0
R
0
0
96